When you go into a store just to eat all of the free samples. It is similar to a shopping spree, except that you're looking for free samples instead of things to buy. This is mainly used as an easy way to get free food and annoy the hell out of the store at the same time.

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.