Top Definition
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
4 Words related to side bro
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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