sheesh means "nice" or "cool" but the word itself isn't nice nor is it cool.
sheesh is a word only said if you want to risk having your ass kicked. Do NOT say this with people over the age of 3 because if some of their braincells survive, they will use it to fucking
slam you to the ground.
Person 1: yo I finally won!
Person 2: sheeesh
Person 1: sorry, what?
Person 2: sheeesh
Person 1: excusez-
moi monsieur,
mais je vais devoir vous massacrer
les testicules.
Person 2: *gets slammed to the ground*