usually used to describe 1) a chill, outgoing, or edgy person or 2) a fresh or novel idea, phrase, outfit, or gadget.
1) OMG he just gave a piggy back ride to that crippled girl so she didn't have to use crutches..he is SO rouche.
2) Our new lunch hangout is so rouche and secluded...we call it the clubhouse
To deliver a massive blow to male genitals, usually done with a clenched fist in an upper-cut fashion. This move is reserved for those who have committed a grevious violation of male protocol (aka breaking "the guy code") and should only be deployed as a last resort.
"The guy sucker punched me after I told him to leave my girlfriend alone, so I gave him the Rouchambeau. That settled that."