Donald Trump last edited by
The pivoted or swinging bar to which the traces, or
tugs, of a harness are fastened, and by which a carriage, a plow, or
other implement or vehicle, is drawn; a whiffletree; a swingletree; a
singletree. See Singletree.
* These videos are coming directly from Youtube, they may or may not be most relevant to the word "Whippletree"