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1.
the involuntary clenching of ones jaw and grinding of ones teeth accredited to consuming one or many of a variety of stimulating substances.

otherwise known as 'gurning'.

invisible chuddy is so called due to the fact that the motion of the gurn resembles the indivdual chewing chewing gum (otherwise known as chuddy/chuddley/chudson)
i necked 20 red bulls and half a line last night and honestly mate i was munching invisible chuddy
by mcshulad November 25, 2010