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1.
adj: more ill, better, sweeter, cooler
damn, that MC just keeps getting iller!
by asdgasg November 27, 2005
 
2.
illers refers to EXTACY
yo son you got them illers
by Mike Bernabo March 21, 2007
 
3.
Is used in reference to a positive situation or thing, similar to "sick guy". Usually used in accordance with either "magillers" or "guy".
"I just picked up a half O"
"Thats illers guy, lets get hizzy"
by brodie May 11, 2004