The internationally recognised symbol for this is the act of holding your hands in front of your crotch with your thumbs and fore fingers touching in a triangular shape.
Luke - Oh he's gone for a facial.
Rupert - He's such a Trouser Triangle.
Luke - James smashes his car up every time he goes anywhere. He drives like a woman.
Rupert - Yeah, he's such a Trouser Triangle.
Luke - James isn't drinking tonight, I think he's grown a vagina.
Rupert - Yeah man, you know why though...(Rupert makes the internationally recognised Trouser Triangle Symbol)
Luke - Yeah - he definately is.
Rupert - James is such a Banter Biter, I ripped into him earlier on Urban Dictionary. He got cross and he has been sulking since.
Luke - Yeah. He's a trouser Triangle.