The Jojo Siwa Phase is when a little girl (usually the age of 5 to 7) decides to be a dumbass and act like jojo siwa.
Katie: My little sister is going through the Jojo Siwa Phase.

Marley: So?

Katie: She thinks she is jojo and gets the same clothes as her and sings like a pisshead.

Marley: wtf

Also Aiden, Fuck you too.
by Kanye Southeast October 3, 2022
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