Commonly mistaken for a certain action, mimicking a submarine out of water in order to break an awkward silence. Contrary to common belief, an awkward submarine is when you have an erection.

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.