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2.
Someone that bats both ways(bisexual),
can put it in all holes!!!
That lads a double adapter
by kellser May 28, 2004
 
1.
...a double adapter is one appliance that can have two plugged in....
a woman who takes one guy in each hole (double penetration) as the yanks so quaintly put it....
by mad dog January 16, 2005
 
3.
A gay man in the middle of a gay threesome .
He takes it and gives it at the same time.
Timing is everything along with good rhythm.
Rod is just a giver and bob is a real taker but Ben swings both ways so he plays double adapter in the threesome.
by roodboy August 26, 2007