Green’s Dictionary of Slang

1. (S.Afr.) an old and spoilt dog; see cit. 1996.

1996		CyberBraai Lex. at www.matriots.com 🌐 STOEPKAKKER: This rude word describes a small, fat and old dog of the spoiled rotten variety which has found its sunny spot on the stoep (veranda) and refuses – with miniature fangs at full snarl – to budge for anyone or anything, not even to take care of its bodily functions.
2000		L. Dysvek ‘New Mobile Report’ 🌐 ‘What the fuck’s a stoepkakker?’ The last man said before he was hit in the stomach with Kayin’s wheelchair. [...] ‘Stupid little dog that sits on the front porch. That’s a stoepkakker.’.
2007		S. Britten McBride of Frankenmanto 10: Telling South Africans not to categorize people, though, would be tantamount to expecting a stoepkakker not to yap.

2. (S.Afr.) in fig. use, an ‘attack dog’, any person who never gives up.

2004

Mail and Guardian (Cape Town) 23 Apr. 🌐 Such a possibility gained credibility when last week the ANC announced that it was engaged in amnesty talks with its political stoepkakker, the New National Party.