masturbextrous 

masturbating with either hand

Wow that was incredible, are you ambidextrous?
-I'm actually masturbextrous

masturbextrous by Rickterscale May 31, 2010

Masturdextrous 

The ability to effectively masturbate with both hands.

Man, my right hand is broken and I'm horny. Good thing I'm masturdextrous!

Masturdextrous by SoulStealr December 14, 2010

masturbidextrous 

The ability to masturbate with both hands without incurring a decrease in efficiency.

*Loads up redtube*
Wait? I can eat a sandwich AND masturbate?! Great Scott. I didn't know I was masturbidextrous.

masturbidextrous by ChristianMcGonez July 22, 2011

Masterdextrous 

The ability to masturbate with either hand.

I wish I was masterdextrous!

Masterdextrous by ThatsWhatStaciSaid June 18, 2013