Third-person singular simple present indicative form of know the difference between one's ass and a hole in the ground

(informal) A situation in which events appear to be repeating themselves in a cyclical fashion.

(informal) To live out a situation in which events appear to be repeating themselves in a cyclical fashion.

An annual festival held in Canada and the USA on February 2 in which the arrival time of the spring season is predicted by whether or not a certain groundhog can see its shadow.

(slang) the state of (a teenager etc) being grounded / A Rastafarian meeting.

(baseball) A ground ball. / A fruit that has fallen to the ground rather than being picked; a windfall. / One of the large stones forming the base of a Cornish hedge.

A red-brown marmot, Marmota monax, native to North America. / (rare) The aardvark.

Innovative; new, different; doing something that has never been done before.

The point at which construction begins, by digging into the ground. / A ceremony to mark the beginning of construction.

plural of groundhog