To wonder off quickly when around a group of people due to an instant urge to get a nut, and hide while rapidly beating your talllywacker (cock) until you blow your load.
Dude where the hell is nick I just saw him? What a faggot hes probably getting a quickbeat in the closet again, lets go throw shit at him.
"Dave insisted on squeezing in sexy time every morning this week just before the bus came! He just can't control himself, he's like the QuickieMonster!"
A phrase/suffix added at the end of sentences to imply the severe urgency of a situation. It can also be added to suggest the high speed of which an action is completed.
The house was on fire so Nate had to jump off the roof with the quickness.
Sandy was 30 minutes late for work, so she had to get dressed with the quickness.
Jason: DAAAAAYUM...You see that broad right there??
Keith: Yeah...she got cakes for days...
Jason: Yo, you need to scoop her up...with the quickness.