slipstreamy adjective2 •Resembling a slipstream. •Resembling slipstream fiction ("a genre of fantastic or non-realistic fiction that crosses conventional genre boundaries").The other zine, run by Gavin Grant and Kelly Link, radiates a determinedly "postmodern," slipstreamy vibe. Two poles of the fantasy spectrum, right? — 2007 formsmore slipstreamy · most slipstreamy