v. when someone bails out of plans or refuses to participate for no other obvious reason than that they have no balls and/or are a pussy
He said he was coming, but I always knew he would puss out.
This is a variant of the verb phrase 'pussy out'. It means to back down from a commitment out of cowardice.
Mike always said he was going to go mountain biking with us, but then he pussed out.
v. something you do when you talk all that smack but when it comes down to it you finally realize you were to scared to do it in the first place
She'd been talking dirty for weeks, but when I pulled out the schlong, she pussed out.
changing your mind at the last minute because her/ she is scared or being a pussy
she wanted a tattoo but she decided to puss out at the last minute