An acronym used in instant messaging representing the common salutation: I Have To Clean My Grandmother's Bad Foot.

An alternative to using g2g or brb to tell people you gots to go and thereby being more specific and providing way too much information.
Nathan: "Hey I gotta sign off of gmail chat, IHTCMGBF"

Stephanie: "Ah okay, ttyl, and give my regards to Adeline.

by RaRa Prince February 6, 2009
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