Sick

Can have various meanings,
In the U.S. it is usually used when something is cool and exciting.
In the UK it is used more to describe something not so pleasant, if something is gruesome and disgusting then it's sick.
The act of vomiting, feeling ill.

It's sick that we get Monday off school.

2 girls 1 cup is sick!

I felt sick yesterday.

by I'mAnonymous February 16, 2008

sick

Adjective.
Interesting, cool, new.

That rave was sick.

by urbanyouth October 3, 2001

sickness

wicked mega awesome, totally sick, amazing

sean:dude, i just smoked a huge ass joint !
ryan: sickness !!

by enitx23 November 18, 2004

It's a sickness

Anything that causes fits of hysteria, overreacting or pontification, that is not caused by an actual physical ailment.

Binky laughed hysterically when the little fat boy dropped his ice cream "It's a sickness."

by Lauri127 December 1, 2005

Sick

Contrary to the common definition of 'something extremely good' celebrated chavs/hoodies, sick is better and more effectively used in its traditional meaning, ie something bad/low. Also said 'that sickens me' or 'thats sickening'.

'I have soo much work to do today it's sick'
'I haven't seen Royston in so long it sickens me'
'Fred is grotesque the way he walks is sickening'

by GoldenBarrel November 22, 2009

SICK!

Said when you have no idea what others are talking about but feel the need to be a part of the conversation. May often lead to an Adeebify.

Ashkon: Hatam's is so gross.
Shawyun: Yeah I know!
Adeeb: Sick! (Adeeb does not know about Hatam's)

by Shashkon1 January 22, 2007

sick

something a lot of people are using to describe something in a positive manner.

person 1: OMG Jack is sick
Me: Why, what's wrong with him?
person 1: *gives strange look*

by the_end_is_nigh (myspace) August 2, 2005