Green’s Dictionary of Slang

(S.Afr.) naked.

1969		A. Fugard Boesman and Lena Act I: It was too early in the morning to have your life kicked in its moer again. Sitting there in the dust with the pieces . . . Kaalgat! That’s what it felt like!
1982		P. Slabolepszy Sat. Night at the Palace (1985) 41: Finally I got her kaalgat.
2005		H. Erasmus Soaring on African Wings 20: Of course Uncle Kassie or ‘Kaalgat Kallie’ (bare-ass Kallie) as Dad used to call him, was always present.