To go to a place i.e a club or pub and mingle with women or men,with the intension of pulling one of them.Or mearly to go into a place an hav a really good time.

Used widely throughout the Australian medical student and broader community to express a desire to get involved with or get crazy at an event, particularly Convention. Widely abbreviated to GAI. Can be used in a larger sentence or as a stand alone phrase with the intent of g-ing up an audience.