On Futurama, when Leela raised the question of whether or not odelay is really a word, Beck suggested that she check her becktionary; this is a dictionary of words that Beck has made up or given new definitions to, presumably. These include: odelay, sea change, devil's haircut, bizness, sexx, etc.

From Bzooty to Whiskeyclone (and yes, Bender, Odelay), it includes all the crazy words Beck probably uses in his songs that don't really exist but sorta do.

Introduced in Futurama, the Becktionary defines all things Beck that are ambiguous.