hetero capacity 

refers to an area occupied by the maximum number of guys allowed by which adding one more would make it very gay/ uncomfortable and wrong

{setting}- 2 friends are chillen on a couch that is clearly made for no more than two people when another guy walks up
Guy: Hey fellas!... got room for one more?
2 friends: Nah dude we've reached hetero capacity

hetero capacity by Brian Dickson June 15, 2007

hetero capacity 

when an occupied space has reached the limit of men allowed to be present without it being and/or looking gay

(2 guys are chillen on a couch)
Guy3:Hey fellas got room for one more?
Guys1/2: Nah dude we've reached the hetero capacity

hetero capacity by Brian Dickson/ Zach McMillan May 10, 2007