Abe Lincolning is the act of entering a bathroom, pissing all over your hand, then exiting the bathroom and shaking someone else's hand with the hand that has been pissed on.
(Person 1 exits bathroom just after Abe Lincolning).
Person 1: Hey buddy, how's it going?
Person 2: Not bad, how 'bout you?
(Persons proceed to engage in cool hand shake involving much hooting and hollering.)
Person 2: Hey dude why is your hand all wet?
Person 1: (Laughing) Dude you just got Abe Lincolned!
Person 2: NOOOOOOOOOOOOOOOOOOOOOOOOOOOO!