Someone with all the qualities of a normal friend except they never take care of their portion of a bill, stiff you on previously agreed upon payment sharing arrangements and take any other opportunity to extract money from you despite being financially very comfortable.
I really enjoy the time I spend with my friendstitute Justine. We laugh, have intellectual debates and reminicse about old times. I just better remember to bring enough cash to pay for everything or our friendstituteship may come to an end.
by KingJonny8 January 19, 2020
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1.) Prostitution + friendship. In other words, you go prostituting (can be done in many, harmless ways) for friends.

2.) Friendship + institution. The conceptual social institution of friendship.
I love that friendstitution makes me so many friends.

Friendstitution is a very complex social concept.
by LingDanc803 December 21, 2022
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A friend that you reward for their humor or pleasant conversation with money, snacks, etc.
Sebastian is a friendstitute, he sent me the funniest text so I bought him a big ass cookie.
by memorycrew January 24, 2019
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your best friends wife (a whore) (a straight-up WHORE)
I'm feeling both happy and sad... which head should I use ??? I love you brother but I'm gonna tap your 'friendstitute' cuz' she's hot. (fckng whore)
by what&where December 3, 2011
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Similar to friendstitution, this is the action (and combination of words prostituting and friend(s)) when someone goes looking for to make new friends endlessly, like a prostitute looking for sex.

It can also mean when one institutes friendship due to having common ground.
Omg, he’s friendstituting at the club again, he has so many friends, it’s ridiculous!

We bonded over linguistics, it was true friendstituting at its finest!
by LingDanc803 December 21, 2022
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