Flipped out

GONEAPE

Think of a slang phrase for losing control that involves a wild primate and starts with "went."

"Flipped out" is a casual phrase meaning to lose control or go wild, which directly hints at the answer. The wordplay here is straightforward—"gone ape" is slang for acting crazy or frenzied, like a wild ape, so the answer is written as one word, GONEAPE. It’s a playful way to describe someone overreacting or losing their cool.