Wiktionary
bang-bang
a. 1 (context control theory English) (non-gloss definition: Applied to kind of feedback control, or controller, that switches abruptly between two states.) 2 (context baseball English) Of a play, very close between being an out#Noun and being safe#Adjective.
Usage examples of "bang-bang".
Maybe Bang-Bang, (bleep) him, had gotten her a demountable sniper rifle.
Bang-Bang slung the empty purse over his shoulder and entered the long, dark tunnel.
He wanted two dollars and Bang-Bang, with the empty purse, had to hike up his dress, fumble in the pockets of the bulletproof suit for his wallet and get out two one-dollar bills.
They went down the elevator and over to the 34th Street Observatory entrance which Bang-Bang usually used due to the large taxi stand there, apparently.