n. a person who relays the shouted signals of the hooktender to the donkey operator by blowing a whistle or operating an electric whistle (an occupation now largely displaced by electronic devices)
1942  The punk! The useless, lazy streak--/ Ruins my ears with his whistle's squeak.
1953  I've been having my troubles of lately,
And it's all on account of my punk ;
He ran off with another hook-tender,
And took with him all of my junk.