This refers to when a male has a date with a female dressed in overalls. The male unbuttons the overalls and places his down the half removed overalls. He then begins to search the contents of the female anatomy previously cover by her overalls. Unbeknownst and without knowledge the male’s father watched the entire search. Upon being confronted by his father and asked what he was doing, the male replies playing Assornot.

When you stick your hands down someone's overalls and you determine whether your fingers in her ass or not