Quick shag 

A short time period when a male has sex with a female for enjoyment and pleasure

I had a quick shag with a girl the other night

Quick shag by Quick shag May 6, 2018

quickshaft 

a jerk who is just doing everything too ridiculously fast for no real reasons
slang originating in the northwestern areas of Chicago

He was going 90 in a 30mph zone, what a quickshaft!

quickshaft by chiiicaaa August 21, 2009