Keep talking or I'm going to shove my yardstick up your ass
"Shut up George"
Commanding someone to stop talking or be quiet or telling them to stop.
To tell people to stop talkining
Frank: hi sister I’m back did u miss me yes? Yahooooooooo-
Linsey: shut up!
OMG or keep going
You:“Britney told me her body Count is ***”
Friend: SHUT UP!!!