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29.
(1)To be 'totally awesome' or 'rad'.
Usually used by teenagers, slang.

(2)To be ill.

(3)To be gross, and/or disgusting.
(1)
Wow, that kick flip he did was sick!

(2)

I couldn't go to school today because I was sick.

(3)
Aw, that last fear factor was really sick! Ew!
by Julie Lieksing August 10, 2009
 
30.
(verb) to sing and fingerpick a guitar at the same time.
I could never sick like she can!
by TheSickFingerpicker July 25, 2009
 
31.
Sick is now commonly replaced by "ILL" or "i've got a cold, bitch"
Sick Replaces words like "AWESOME" and "ew, GROSS" and also various otheres..

examples:
a young sappling says to his older friend skater:

Sprout:yo boi that trick was SIIIICK
Jack:uwh-yeaaaah i can 360 wizzyspin to wizzezspin out!!

Jane:VOMITS
Jill: EWWW THAT WAS SICK.
TTHHHATT WAS SICKK AAAAAAAAH
AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
by ISKATE February 11, 2009
 
32.
The state of being angry or mad after finding out you girlfriend was in your enemy's car. This word is very common in Harlem.
Your boys around you point & laugh while shouting "Ahhh, You sick!".
by NoBetterLove<3 December 22, 2008
 
33.
The ultimate of cool.
That cigarette (speed)boat is so sick looking!
by john romano November 23, 2008
 
34.
The state of a being, action, or object that deserves true recognition, further contemplating, or in certain cases, a recognition of a persons actions that are truley without a rational consciousness. Commonly over used. Not to be used for artificial bullshit, only used when something truely "sick" occurs.
"The whole side of that building had a sick murel design.", " That concert was sick." or "That sick fuck threw a microwave out of his car window."
by ajwdesigns May 10, 2008
 
35.
if it is sick its toatally awesome
"check out my new quad"

"buddy shes sick!!"
by kris loveless April 03, 2008