Top Definition
Pr: Eye-see-why-gee-bee

Stands for "In Case You Get A Boner"

-The reasoning and explination for the slit or missing piece in the front of public toilet seats.
Mike: "Hey Miranda. Are the toilets in the girl's bathroom ICYGB?"
Miranda: "Yeah, they are."
Mike: "Why is that?!"
by mike28115 April 02, 2009

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