go moggy

verb3

1. •
   (South-Africa, informal) To go without restraint; to go wild; to be adventurous.
2. •
   (South-Africa, informal) To go crazy; to be somewhat delirious.

   • B: "That's a bad place, I tell you, I nearly went moggy in that jungle, hey." A: "That's only because you got that bump on the head, when that bus ran over ..." — 2002
3. •
   (South-Africa, informal) (usually in the past tense, as in "gone moggy") To become broken, disorganized or dysfunctional.