IHDI 

Acronym for "I highly doubt it." Coined by DeM GoTcHa BoYz circa 2008.

"A video and torrents forum on digitalgangster.com? IHDI."

IHDI by The Posp2 October 20, 2008

ihdikah 

idk or "i don't know" except typed as if it were pronounced

"What are you doing tomorrow?"
"ihdikah"

ihdikah by Geliva January 28, 2010