Illen
Verb -Derived from the Beastie Boys "get ill". Illen is the ultimate expression of funk and awesomenessness.
Casual conversation:
"man, that Woothead is illen it up!"

From the Beasties comes Illen:

You been fully captivated by that funky ass bass
Your girlfriend screams when M.C.A.'s in the place
He stumbles in the room with the Chivas in his hand
Cold chillin' on the spot at the microphone stand
I'd have the pedal to the metal if I had a car
But I'm chiller with the Miller cold coolin' at the bar
I can drink a quart of Monkey and still stand still
What's the time? it's time to get ill