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2.
1: thick, deep, slow moving liquid.

2: cool, calm, chill

3: Awesome, dope, fetch. cool, rad
1: Molasses is quite viscous, water is not.

2: Dude, you were so viscous in there; they totally didn't see I jacked those shoes.

3: Man, that was so viscous!
by yeaboi69 May 29, 2012
 
1.
Having high resistance to flow. In other terms, the more dense the thicker the consistency. Is meant to be applied to asses of substantial dimensions.
Damn baby, you viscous!
Kim Kardashian's sweet ass has the viscosity of a generous dose of corn syrup unlike Paris Hilton's ass that is just like a teaspoon of water.
by Reagan 05 May 25, 2008
 
3.
(Visc-wuss) It is a different pronunciation of the word vicious, when something is particularly vicious you say (visc-wuss) to emphasize it
We lost the final in the 93rd when he took a viscous strike on his left foot and scored
by iKielo1 February 03, 2009