when people are exicted they say this now. originated from this anime called spy x family where this little girl called anya would say this
Mom: ok we're gonna go to hershey park tommorow
person: WAKU WAKU
5👍 5👎
When someone wants to make a dirty joke but doesn't say it and leaves it to the listeners imagination.
Arisa: *Eats a hotdog*
Reg: "I could make a joke right now."