'Meth' definitions:

Definition of 'meth'

(from WordNet)
noun
An amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant [syn: methamphetamine, methamphetamine hydrochloride, Methedrine, meth, deoxyephedrine, chalk, chicken feed, crank, glass, ice, shabu, trash]

Definition of 'Meth'

From: GCIDE
  • Meth \Meth\, n. See Meathe. [Obs.] --Chaucer. [1913 Webster]