When two kids get mad at each other and start telling each other to shut up. There's also "you're gay" wars too.
Me: Look at them; they're having a shut up war. Heh.
Kid 1: Shut up!
Kid 2: No, you shut up!
Kid 1: No, you shut up!
Kid 2: No, you shut up!
Kid 1: Shut up!
Kid 2: No, you shut up!
Kid 1: No, you shut up!
Kid 2: No, you shut up!
by spel itt rite June 21, 2006
The shut up war happened between 2 7th graders named Atlas and Dana on October 13, 2020. What went down was a series of the words of "shut up" and "no you". At some point, Atlas says "Shut the fuck up". That was the tensest part of this war.
by I’m used as an sex toy October 13, 2020