Alien Hand
The process of sitting on your non-dominant hand until it's numb and then using it to masturbate thus giving it an otherwordly, phantom-like quality.
Dude, Sheila's been pissed at me for weeks. I've had to resort to giving it the ol' Alien Hand in order to see any action.
Alien Hand Syndrome
To be unable to control ones arm or arms. This can also be present when regarding the entire body (see Alien Body Syndrome).
Ross: Dashton, why did you nock over that expensive drum kit?
Dashton: Sorry, alien hand syndrome.
Dashton: Sorry, alien hand syndrome.