Apeshit

[Sonia]

A state of anger and rage that produces behavior more closely resembling that of an enraged ape than a human.
From the habit of enraged apes of flinging their own feces at their object of anger (if you havent experienced this phenomenon first hand consider yourself blessed).

[Donald Trump]

adj. An undignified loss of control, as in To go apeshit.

[Jason Yan]

Extreme anger or a state of insanity stemming from anger. When someone goes fucking crazy.

[Justin Bieber]

To loose all sense of reason. Said apeshitter will often start to speak in some strange language where the only recognisable words are fuck and other curses.

[Becky]

To go completely off the deep end; succumb to extreme rage.

[Jason Yan]

Really really really angry or pissed off!
Its not uncommon to go [apeshit]:
When the dog shits in yer slippers.
When your husband sleeps with your sister.
When some ugly bollocks grab asses you.
When cars purposefully splash you on your way to an interview in your lovely white suit.
Most things the average family does.