The proteins and connective tissue of mammals (animal fat) which is somehow turned into some type of unnatural substance that one injects under their skin. It is mainly used by ragged, thin lipped hookers who have spent too much time sucking cock without sunscreen on their mouths or something (exp: Lisa Rinna, Jessica Simpson). It is also used to smooth out wrinkles and make you look like a zombie freak (exp: Nicole Kidman).
suzy: "What happened to Karen? She's hideous."

sharon: "She didn't like her thin lips so she got collagen injections."

suzy: "It looks like someone punched her in the mouth."
by Missylalala May 28, 2006
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Dietary Supplement. 20 g collagen per serving. Paleo friendly. Dairy free. Gluten free. Contains 8 of 9 Essential amino acids. Skin, hair, nail + Milfs force it down by the gallon from unsuspecting young men.
Hey Erin where did you disappear to last night?

Erin: what that young guy gave me all his collagen would have cost thousands. I milked him like a cow.
by Sixcircles March 30, 2022
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The type of upper class woman (usually a bleached blowout blonde) yelling at minimum wage employees because she can't return an expensive item with no tag/receipt. Unaware of class struggles and pain of marginalized groups. Collagen lips and plastic surgery paid for by rich (but absent like her own rich and absent father) husband.
Collagen Karen: OMG! How dare you not allow me to return these Prada sunglasses even though I ignored all the store's policies! I need to speak to the owner of the building- What's your name?? Lemon?!

Employee : You're a grown woman throwing a tantrum, ok Collagen Karen.
by heyworl June 8, 2020
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