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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
2 2
adj: more ill, better, sweeter, cooler
damn, that MC just keeps getting iller!
by asdgasg November 27, 2005
33 5
illers refers to EXTACY
yo son you got them illers
by Mike Bernabo March 21, 2007
2 2