bro pill

1: Being in situation or position and having peer pressure to do something, like having to "chug" a drink or do something that everyone is doing or has already done and it's your turn to do it.

2: Being in a persuasive crowd, usually mostly made up of males, and trying to get someone to do something to fit in with the rest of the crowd.

Johnny took the bro pill after the other boys dared him to cross the rickety-old bridge.