Top Definition
Stands for "If Not Now When?"
Man: hey sexy wanna have sex?
Woman: Not right now!
Man: INNW?
by superman March 31, 2005
1 more definition
INNW(If Not Now When)
guy 1: hey dude im not going to the store now.
guy 2: If Not Now When?
by Bob April 16, 2005

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