1 definition by BigDikFil

An especially shitty way of driving. Basically, you get as close to someone's bumper as possible before you merge in front of them effectively cutting them off. Commonly seen from FIBs in northern Illinois and southern Wisconsin
Jim: THAT FIB JUST CUT ME OFF!
Josh: that's called a Chicago merge.
by BigDikFil February 5, 2017
Get the Chicago Merge mug.