A type of sex (or more precisely attempt of sex) occuring between two fat people. Typically the guy is originally on top, until the rolling inevitably occurs. More awkward temptatives usually follow but all inevitably fail due to belly barrier presence.
Fat Him and Fat Her during hamster sex sexsion: "here, try again!" "here where???" "left, move to the left" "here?? oh yes here!" "no no thats my donuts!!"