when something happens and it turns out to be funny or a pog moment or something not right
Person 1: Im dating a 18 year old girl!
Person 2: SHEESH
you sheesh till you sheesh away to somewhere else
boy:sheesh
other boy:hey where are you sheeshing to?
boy:china
boy:weeeeeeeeeee
other boy:...
It means when your don't believe in something of you are bored.
Sheesh! That's epicly cool
Sheesh, I don't believe that.
Me: Yo dude. Check out my new bike.
My friend: sheesh