Green’s Dictionary of Slang

(S.Afr.) to hit, to beat up.

1984		P. Slabolepszy ‘Over the Hill’ in Mooi Street (1994) 53: Bliksemmed the bladdy bird with a baseball bat.
2008		Mail & Guardian (Johannesburg) 19 Aug. 🌐 Bliksem the little turds I say and teach them respect!
2010		Mail & Guardian (Johannesburg) 7 Jan. 🌐 Bliksem, when used as a verb, [is] a useful synonym for moer.