Go Moggy Meaning

(chiefly South Africa, Zimbabwe, idiomatic, colloquial) (usually in the past tense, as in "gone moggy") To break something or to cause something to become disorganized or dysfunctional.

Example: 2002, Dan Wylie, Dead leaves: Two years in the Rhodesian War[1], ISBN 1869140052, 9781869140052, page 79:
  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 ..."