Jimbo the giant
U19 12th Man
That definition is pretty broad really it doesn't have to look as calamitous as the Donald example. Just wafting at a ball early in an innings can be due to over thinking and nerves or just missing a straight ball as well.According to Malcolm Gladwell, a choke is when a sportsman starts thinking too much about what they're doing to the detriment of their carefully honed skills. Donald's run-out in the 1999 WC Semi is a classic choke, because rather than just reacting to his partner's call as he'd been trained to do, he was too busy thinking about where the ball was, and what he should be doing. It's arguable that none of SA's other WC exits meets this definition though, so in their case the term choke has been used more in the sense of finding ways to lose from a position of strength.
I reckon you's are over thinking things a bit, its pretty clear that SA has choked in the majority of their exits. Only the SL game in 2003 wouldn't be considered a choke IMO, that was just a simple miscalculation. They actually thought they had won that game until they realized they had made a mistake after the fact.