To make large advancements with your crush or others. This includes anything from saying hi to someone you dont know well to asking your crush out. Doing anything that needs any amount of courage to do can be a big boy move.
Rose made big boy moves when she asked out Wayne in biology.
by Rose Blue September 20, 2019
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When someone does something underhanded or illeagl. Such as killing, stealing, arson, Etc.
Jim: these guy's keep killing us.
Jack: ok I'm going to commit a big boy bad move.
by Pvtpinecone January 14, 2020
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