This is an actual slang term for the perineum. I've heard it in use in the Northeastern US. People adding entries for this definition may not all be doing so in the most presentable of manners, but it's a good faith effort to record a colloquial meaning for the word. --126.96.36.199 07:44, 29 September 2006 (UTC)
A quick google of grundle perineum OR genitals OR anus OR genitalia OR skin (to strip company/band/avatar names and other meanings) yields 17,100 hits. --188.8.131.52 07:54, 29 September 2006 (UTC)
"Grundle" was used as slang for the perineum in the movie "Dodgeball", as one of the first lines of the movie. I'd call that a reasonable source to cite to cement slang use of the word.--184.108.40.206 01:23, 20 August 2008 (UTC)
Citing slang terms
I can not find reference to the term in any slang dictionary I have access to.
We need three citations from "durably archived" sources to include a meaning of a term that is challenged, which means print books and periodicals and, more relevantly nowadays, online sources like Google Books, Google News, and Usenet. For a "vulgar" slang term, Usenet and google books (the latter with Subject:fiction) are the best hope. Happy hunting. DCDuring TALK 23:35, 18 September 2008 (UTC)
Wikipedia redirects "grundle" to perineum. It's interesting that it's used in so many places even so far as to be included as a redirect, and yet, because it hasn't been sanctioned by the pope, it's just a minor slang term that needs no mention on Wiktionary whatsoever. The rules are important to restrict insular slang from finding its way onto Wiktionary, but there's a point where a word is clearly used and known to a point that it needs to be mentioned for completeness. Most people know that grundle is slang for perineum and they do NOT know these other uses of the word. That's a severe omission in my opinion. Whatever job Wiktionary thinks it's doing, it's not serving the needs of the people who want to use it.--220.127.116.11 04:48, 18 May 2009 (UTC)