Big ol' mouth
(Other definitions for trap that I've seen before include "Ambush" , "Snaring device" , "Deceive" , "Snare; pony carriage" , "Gin - hidden danger" .)
(Other definitions for maw that I've seen before include "gulf" , "Mouth of a voracious animal - or an American mum?" , "Gaping mouth of voracious animal" , "Mouth of a vicious animal" , "Jaws or mouth of a voracious animal" .)