This is a CHICAGO slang term. It is used as a filler in sentences. It can be used interchangeably with "whatever" or "etc..".
"Last night Michelle and I were drinking, watching tv, woo wap da bam, and all of a sudden her mom came home. Can you say AWKWARD?"
by LondonXO October 12, 2017
A phrase used in the ghettos of Chicago, primarily the Gresham-Chatham neighborhoods. It is used to describe loud noises such as bangs, booms, crashes and gun shots.
Police responding to shots fired call.
Officer: "Did you see what happened?"
Subject: "Um yea, so what had happened was, dude just started woo woo wooing, and I seen him pull out a gun and woo wap da bam, Jo' was on the flo'."
Officer: "Did you see what happened?"
Subject: "Um yea, so what had happened was, dude just started woo woo wooing, and I seen him pull out a gun and woo wap da bam, Jo' was on the flo'."
by Chatham Gresham February 26, 2014