What is Hang And Bang?
1.
hang is the act of drawing a gun, and bang would be firing the gun.
Man he better chill out before i 'hang and bang' his punk ass.
See
2.
A suspended or inverted rollercoaster (especially a Vekoma Invertigo or SLC model) that is badly engineered, causing headbanging on the shoulder restraints.
"My ears hurt!"
"Well, that'll teach you not to ride Hang and Bangs, won't it?"