That certain onomatopoeia that is rare and unheard of pretty much everywhere. Usually uttered by strange males whenever something unexpected happens to them.
"Walking is sure fun. I hope I don't trip-
gurks. (Uh ohcover up! I think that chick saw me!)"
The act of destroying a bridge by dropping a bomb from an aircraft. Mostly used when the bridge in question are being destroyed for personal enjoyment or in an effort to ward off boredom.
Rather then bringing my unused bombs back to the Aircraft Carrier, I used them to gurkbridges I passed on the way.