A beard that has been shaped to look like a chin strap of a helmet. Ironically, the only people who choose to go with a chin strap style of beard are themselves by definition, helmets.
"You see that bawbag Dean has grown a 'beard?'"
"No way, what's that stinking swamp donkey gone with?"
"A fucking Chin Strap , looks a right cunt"
"Damn, what a cunt"
"Aye, he's a cunt"