The clumped formation a man's gooch hair takes in humid or moist conditions.
"Crikey, that was one tough game of squash Henry, I bet you can't wait to see my ass moustache in the changing room!"
"I love just standing in the shower, daydreaming and giving my ass moustache a twiddle"
"That bhuna is not agreeing with me. I think I'm going to have to rinse my ass moustache of it in a few hours"