When you are making nookie with a particularly large person and find within his/her rolls of fat an Item of food which has been stored for a indefinite amount of time ... and consume it or feed it to him/her.
I was phumping your mom last night ... found a do-nut
by Fish_man12345678 June 08, 2010
Perspective humping. When you line up with another person and pretend like you are humping them through the use of forced perspective. Usually best when caught on camera.
At zentalklaugh, when Jon wasn't looking, Frank starting phumping him when he bent over to check the calendar.
by joezen777 August 11, 2010