GM

Noun

 * , a measure of a ship's static stability in roll.
 * , a measure of a ship's static stability in roll.
 * , a measure of a ship's static stability in roll.
 * , a measure of a ship's static stability in roll.
 * , a measure of a ship's static stability in roll.
 * , a measure of a ship's static stability in roll.
 * , a measure of a ship's static stability in roll.
 * , a measure of a ship's static stability in roll.
 * , a measure of a ship's static stability in roll.

Proper noun

 * 1)  an American multinational automotive manufacturing company headquartered in Detroit, Michigan.

Verb

 * 1)  To act as a game master; to run a tabletop role-playing game.

Etymology
From.

Usage notes
Common on the internet forum.