Ploaf is a nonsense word used often as a synonym for excrement, but may replace any word or part of speech. The term originated from a misunderstanding of a team name in the classic cross-platform real-time strategy game, Myth, from Bungie Software. That team's name was "The Pimento Loafers", shortened as "ploaf" (from the 1999 Myth World Cup on Macobserver.com). "Ploaf" is now most commonly used online since 2004 as part of a username (see the user profile for "ploafmaster" on RadioParadise.com from 2004).

Both of the cited uses of this word predate the older UD definition, as evidenced by the examples.

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.

A name usually give to evil nazi doughnut eating wanna-be ircops.

loafng for pleasure, a combination of 'loaf' and 'pleasure', verb "ploafing".