After learning these words, there is a 200% chance that your family is going to ruin them, but why not educate them when you're home with them for an entire month?!
Lit: "Lit" doesn't just mean "drunk" anymore, it means "awesome" or "dope" AND by adding the word "it's" in front, making the it the phrase, "it's liiiiiiiiiiiiiit" your family will be the coolest of the cool. You can't really use this word wrong, so it's a nice easy slang word to start out with.
NOTE: "lit as hell" is when something is extra awesome, such as a delicious meal, or hearing good news.
Wuet Da:Instead of saying boring old, "what the heck!!" you can get your family saying "wuuueeet daaaaa," which sounds ridiculous, but is also incredibly contagious, and once they start, they probably won't be able to stop, and they will have you to thank for that!
Shortening Words: no one has the time these days to say entire words. Noodles, desserts, appetizers, any word with more than one syllable is too long and needs to be shortened. So, instead of saying "noodles," say "noods," and instead of "sandwiches," say "sammies" and instead of "sunglasses," say "sunnies." The words are now short and simple, and people will probably have no idea what you're talking about, but that's okay!
NOTE: if you're looking for a challenge, instead of saying, "sushi," say "sush"
Swag: The word "swag" has been around for awhile, but it's still a great word. "Swag" can be used in really any context, FOR EXAMPLE: if someone compliments your shoes, you can say "swag" and it works as saying "thank you" but in a super millennial way, and who wouldn't wanna sound like a millennial?
Yuke: Yuke = Puke, but pronounced without the "p." This word is obnoxious, but sounds so much better than "puke," or "barf," or "hurl." So, instead of saying any of these other options, go for "yuke."
Yummies: Yummies are anything you can eat, but really shouldn't. For example, anything with a drive thru = yummies. Food from Taco Bell (my lord and savior) is considered yummies, food from MacDonalds, also considered yummies.
NOTE: when going through the drive thru to retrieve you yummies, make sure to announce that the person handing you your bag filled with delicious gross-ness that, "THE YUMMIES HAVE ARRIVED"
Snackies: "Snackies", is just "snacks" made longer. It sounds cuter and slightly more obnoxious when asking your family, "do we have any snackies in the house?" rather than just using the normal (yet bland) word "snacks," but that's what makes it so much better!!
GOAT: This word is just an acronym for "greatest of all time" and when you're referring to someone or something as "THE GOAT," they probably aren't, but keep using it!
Tha Boy/Tha Girl: When you're referring to someone who is downright awesome, you might refer to them as "tha boy" or "tha girl." An example would be, "Christian, tha boy, brought a 20 piece mcnugget to the party on friday, and it was liiiiiit as hell!" (This is also an example as to how some of these words and phrases can be combined to make you sound even stupider)!
Homegirl/Homeboy: One refers to themselves as either homegirl or homeboy. An example would be, "homegirl needs some grub." AKA, "I am really hungry and food would be perfection."
Gucci: Simply means "good."
FOMO: An acronym for "fear of missing out" and we all know some serious FOMOs and now you have an easy word to describe them, YAY!
Salty: This is best described as a synonym for "pissy" or "annoyed." If you want to add extra millenial, you can add "lowkey" (kinda) or "highkey" (a lot) in front of "salty" when describing your mood, or someone else. "I was highkey salty when soandso cut me in the Starbucks line the other day."
Slay: meaning, "killed it." We have yonce' to thank for making this word so popular right now after she dropped some serious fie with Lemonade.
Fire: Something hooooot. "straight fire" can be used to describe a bitchin' album or an attractive person. The possibilities are endless.
Extra: Used to describe someone who is extremely over the top. "Wow, you're so extra!" Meaning, what you're doing, should be toned down, a lot.
And even though it's not "slang," if you teach your family how to DAB this winter break, you surely will be teaching them just how stupid the dab really is.
LAST BUT NOT LEAST
Woweeeeeeeee: Best pronounce as "waaaaaaaaaah weeeeeeeee," this word is best used to describe disbelief, but can literally be used whenever you goddamn feel like it. My all time favorite word, especially because I got all five of my roommates to start saying it, "wowee" can be used in so many different situations and that's what makes it so special.