Definitions by G.O.B,

Hamtasm 

N. When a girl makes a guy a sandwich and then proceeds to give him a blow job as he enjoys the sandwich.

NB: The sandwich does not have to be a ham sandwich. It can be any type of sandwich.

John was hungry, so he asked Mary to give him a hamtasm during foreplay.

Hamtasm by G.O.B, October 12, 2009