Top Definition
A bro who is not really part of your main group of bros, but is chill enough with some of your bros that he can occasionally hang out with your main group of bros.
Hey guys, lets hang out tonight. You can invite any of the sidebros if you want.
by drebay19 August 28, 2016

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When you don't have any bros left in your bro inventory. This one isn't as good, but he is better than nothing
Don't have anybody to hang out with. Might call Cris, my side bro
by xXsircXx February 10, 2014

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if your a woman, and have a boyfriend and are talking to another guy behind your boyfriends back. you are his side chick, he is your side bro.
jack is my sidebro but ronald doesn't know!
by madethisup July 13, 2015

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The male equivalent of a side hoe.

A guy you're going to pound town with on the side that your boyfriend doesn't know about.
Ugh I'm so sad that my boyfriend is out of town...time to call my side bro and get that D
by Trapbabe123 July 11, 2017

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A term that girls use when they have multiple guys on the go but are not in a relationship with them.
Omg Becky has like 4fucking side bros on the go
by Rlk17 July 20, 2016

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