Side friends 

Not your bestie or your real friends but someone that you hang out with when all your friends are gone. They’re kinda like side hoes

Becky: Ashley why were you talking to Samantha and Amy

Ashley: don’t worry Becky they’re just my side friends
Samantha & Amy: hey Ashley I heard that.

Side friends by Iloveolddisneymovies November 26, 2019

Side friends 

People you hang out with on a daily basis who aren't really your friends.

All my side friends want a piece of my new pay check ha!

Side friends by Allie2002 April 9, 2020

best friends on the side

The act of a subset of people from a group of mutual friends engaging in a side friendship.

Also shortened to "BFOTS"

"Oh so y'all hung out last night without ME? Talk about Best Friends on the Side!"

"Wait where was my invite when yall was BFOTSing?"

best friends on the side by Kassieme July 9, 2015

Side Friend 

Someone you talk to that you really don't care about.

my side friend was annoying to talk to

Side Friend by tbonehuber November 3, 2010

Side Friend 

Someone you only call when your real friends are busy.

I was really bored, so I hung out with my side friend.

Side Friend by mike937 May 4, 2016

Side Friend 

Someone you don’t treat the same as your other friends. Like you could be all hyper and having fun with your friend then once they’re unavailable you talk to your side friend and don’t act the same and act more dry with them. Also the side friend can show more and participate more in the “friendship” while the “friend” is only talking to them just to talk to them waiting for their real friend to call them back

*On FaceTime with a friend* (Hyper, talking a lot, laughing a lot)
*On FaceTime with a side friend* (Dry, barely talking, could repeating the same simple word after the side friend says something)

Side Friend by I.IS.THAT.BITCH July 7, 2019

Side Friend 

A side friend is a person you are 'friends' with because your other friend is friends with them. So basically your just friends with them because your friend Becky is too. So when you, Becky and that person are all talking, you guys are all considered friends, but if you were left alone with that side friend, it would be awkward to keep a convo going because you guys aren't really friends without Becky there.

You consider your side friend as one of your friends, but deep down inside you know you guys don't really talk without someone thats both of your friends.

"Me and Emma are side friends, if we were left alone it would be so weird"

Side Friend by Crackers and Cheese April 24, 2017