The phrase "bahbup" is used to emphasize a military grade ass kicking in the military simulator / game Arma2: Operation Arrowhead. The phrase originated from a UH-60 Blackhawk pilot and gunner were floating over a village providing support for ground units. After every time the gunner would neutralize an enemy he would shout "BAHBUP!!!" or "BUPBUPBUP GET SOME! FUCK 'EM UP!" It also said to be a Dutch word for "fuck 'em up".
BAHBUP-BUP-BUP-BUP FUCK 'EM UP! Got 5 of them!