A sexual encounter in which the penis of a male sexual partner is placed inside a hotdog bun and then consumed by the other sexual partner in some form of fellatio. The hot dong can be performed either flaccid or erect, depending on penis size and sexual fetish.

The hot dong can be garnished with the usual condiments: ketchup, mustard, relish, onions, etc. The bun can be toasted to improve the texture, taste, and structural integrity of the hot dong.

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.