Noun – First of all, lets get something straight – a set of big tits is a ‘rack’. In Beer Pong, the term ‘rack’ has two meanings that are used interchangeably. A ‘rack’ is either, still nice big set of boobs, or is used to describe the set up of cups on a beer pong table. If you have a ‘nice rack’ in beer pong your cups are centered on the table in a solid traingle and the edges of the cups do not overlap. If you are a girl and have a nice rack your breasts are perky, size c and up, and you are showing a lot of cleavage… A lot.