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.
by Anubikai June 01, 2006