I have seen pronk used as a verb to mean leaping through the air, as an antelope does. However, in a new word book I have, the first definition of it is a weak or foolish person. It says that the origin is uncertain, but may come from the Dutch word meaning fop. Has anyone ever seen it used as a weak or foolish person?
Arnie, my source "Weird and Wonderful Words" by Erin McKean, says, "'Pronk' is also a verb used in South Africa of a springbok's leap in the air, especially as an alarm signal". It first said that the "weak or foolish person" definition may have come from a Dutch word meaning "fop". It did say the origin is uncertain.