Definitions by John Palumbo

Moosejaw 

Similar to lockjaw, a painful cramping of the jaw caused by the continual sucking and repetitive up and down motion of giving a blowjob. Usually caused by a large and girthy penis, known as a mooseknuckle.

Oh my god, his dick was so big, sucking him off gave me the worst case of moosejaw.

Moosejaw by John Palumbo December 4, 2007