go apeshit

To have a cow and totally lose it.

After his pet baboon got out of its cage and threw its feces all around the house, Mike totally went apeshit.
(go apeshit)

Go apeshit

To go ham and just let all your animosity or frustration out on whoever is fucking with you in a savage animalistic manner

Next time Jeremy comes at me on some bullshit ima go apeshit on his ass