A rusty midget is when you engage in sexual intercourse with a female who is on her period, in which afterwards when you lose your boner, and have not cleaned the newly dried blood and which therefore leaves a rusty looking residue on your soft little midget!

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.