some body who loves to give anal sex.
After a romantic meal for two Boatyard John likes to mash Richard Newmans dinner for him via his asshole. He is a great big dinner masher.
by JPH November 27, 2003
2 more definitions
A male homosexual. Slang for a faggot.
A group of UK soccer players on vacation in the US discovered that the beach they were on was a GAY beach. "Look at this Clive. The bloody place is crawling with dinnermashers!"
by Bill Alphonso's Dentist August 11, 2007
one man using his errect penis to "mash" another mans dinner via his arse hole.
Julian Clarey is a "dinner masher"
by jon September 22, 2003