Derived from people that speak on hands free and look like they are talking to themselves (as there is no one visibly present) but are in fact having a phone conversation.
The 'mentals' on the other hand, have the exact same conversation... but they ain't plugged in to no one!
Poor old Billy ever since he caught his mum engaged in bukkake with the local football team and his dad then committed suicide and his pet dog got run over and his house got burnt down and he lost his arm in a chainsaw accident, has gone a bit handsfree. Man, I swear down, I saw him in the street the other day, shouting at himself.
2. (verb) Any act of lone sexual gratification which simulates real sex by refraining from the use of hands.
2. "Man it's my 40th birthday and i'm still a virgin... i'm guna go home and put my dick in the hoover. I've been handsfreeing for 20 years"