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1.
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
16 4
 
2.
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
8 1
 
3.
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
13 8