Green’s Dictionary of Slang

a bald-headed person; a bald head.

1966		I. Vaughan These were my Yesterdays 97: Her father [...] cut her plaits off. Said to barber, ‘Cut short. Can’t have hair and brains one or other. Brains better for her, she so plain.’ Barber said to father, ‘You are only an old Bleskop how can you know.’.
1970		M. Wolfaardt informant, Stilfontein in DSAE (1996) 72/1: Your Dad is a real bleskop. (Your dad is bald).
1982		B. Simon et al. Cold Stone Jug: The Play 17: I mean that that door is going to open and the Governor is going to walk in, in his double-breasted suit and his shiny bleskop [DSAE].