(driving) -signaling WHEN turning!!! -giving absolutely no early notice of your desire to turn until too late!!!, leaving following driver hanging 'high and dry' (just like coitus interuptus!!) to fight for their right to move ('party') against oncoming/flowing traffic!! -not a pleasant predicament to find oneself in!!! -may these brain-dead 'souls' all 'catch' terminal cancer!!!

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.