A person who masturbates, and ejaculates in their own hands. Immediately after ejaculation, they commence random hand shakes with people around their office, or place of work.
I was planning on quitting my job this week, so I ganklebanked my boss and I think he wiped it off on his face.
Someone who spanks at get togethers and then presses the flesh to share his 'man lotion'.
It was high fives around the room after the Packers scored once again on the Bears. MrPack rushed from the washroom and snickered aloud while giving everybody a double high five, as he's quite the sneaky ganglebanker.