Whomp also comes from the late night TV show "Showtime at the Apollo" where contestants compete in a talent competition. When people suck, a guy tap dances them off the stage and the audience yells, "Whomp Whomp!! Whomp Whomp!!"
You can also use just one whomp.
whompity: the adjetive to describe things that deserve a hearty "whomp, whomp"
"man, i have to go do my homework"
"cleaning toilets is probably the whompitiest job ever."