TWACK v. To strike with great force using the back of the middle finger (usually the nail) after coiling it under pressure against the opposing thumb. Accomplished twackers can inflict great welts upon their victim's flesh.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.

Someone who is in the gray area between a crackhead and retard.

TWACK v. To strike with great force using the back of the middle finger (usually the nail) after coiling it under pressure against the opposing thumb. Accomplished twackers can inflict great welts upon their victim's flesh. (This definition posted by the forerunner was removed from the Urban Dictionary by some evil force... but truth shall prevail!)

1. Another word for Crystal Methamphetamine.

2. Common objects associated with crystal methamphetamine. These objects can be signs that junkies are present or were there recently (maybe crashed on the floor/couch). These things include really crappy drawings of graffiti on scrap paper, uncleaned dog poo/drinks/food on the carpet, broken light bulbs/missing light bulbs (can be improvised to smoke meth), crafty arts that require short attention spans (for females), left-over traces of meth on the coffee table, and other various tweaker paraphernalia.

to be super tweaked

A term originating from Huntsville Alabama, Means to have sex or intercourse.