In lower case means intercourse. From the funny movie Caveman starring Ringo Starr and Barbara Bach. ShellyLong was in it as well. Probably her best ever performance.
A person who is only interested in mathematics and refuses to believe that statistics is real math. Zugzug's are also terrible at chess, and struggle to reach a height more than 2 standard deviations below the mean.
Bro that dude is a absolute zhuzhao, xuzhou, zaozu, xuzhou. He ZugZugs all the time...
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"