A person who looks like you, whom a mutual friend or acquaintance has photographed or tagged on social media. Or mentioned. Or put you in contact with. Whatever. You then confirm the verisimilitudinousness and end up being buddies. What could be easier, or freakier?
S: The pool attendant at my gym looks SOOOOOO much like you. I want to take his picture.
H: You should. I'd like to have him as my Face Buddy.
H: You should. I'd like to have him as my Face Buddy.
by Zoboomafoobar May 8, 2013

When someone or someones you don't want to accompany you on a trip stow away and come with you.
Initially from the Disney Pixar film 'The Incredibles'
Initially from the Disney Pixar film 'The Incredibles'
I really didn't want to go to the party with 'X' but they turned up at exactly the same time as me and latched on. I've been buddy spiked
by The Church of the Ageing Goth October 27, 2023

(n) when two people who have mastered the art of upfriending, upfriend each other from the same friend mine or friend farm.
by gambler325 June 16, 2016

by S.Dotkajfjsjsjsiei June 29, 2017

when you and/or someone have gone down(oral) on the same girl. past or present girlfriend, stranger, fling, one night stand, f*ck buddy, or relative(not from the same family tree!!)
from the movie, No Strings Attached, the son had a girlfriend but they broke up, in the future the father started dated that same girl...the son's friends called him out on being tongue buddies for going down on the same girl
by JamesPDX January 4, 2012

A guy who may be a person, but a guy so it still counts as a name even though it's what you call your friends when your a cornball
by fartomitris March 30, 2024

Sometimes derisive (but not always) Southern US/Floridian drug dealer slang for a customer. Probably because they don’t bother to learn their names.
1:
Q: “Is that a friend of yours?”
A: “Nah, bruh. Just a Buddy.”
2: “Ever since we got that new pack, I got Buddies blowing up my phone all day!”
Q: “Is that a friend of yours?”
A: “Nah, bruh. Just a Buddy.”
2: “Ever since we got that new pack, I got Buddies blowing up my phone all day!”
by real dethkon January 5, 2021
