Abbreviation for illustration, used mainly by the same people who use an abundance of other abbreviations such as LOL, u, r and so forth (otherwise called netspeak and chatspeak) in their online language for no apparent reason.
by MrPumpernickel October 08, 2006
that imdillondavid guy is such an illo
by platinumprince June 04, 2020
by Boob noob June 15, 2020