Pants up a flagpole
A friend worked in a boarding school as a boarding master. It was his birthday, and another teacher broke into his room via the window and stole a minging pair of boxers, as it was the other guy's birthday the next day.
The next day, at breakfast (with the 100-or-so boarding boys), lots was made of obscure pants-related jokes. Said birthday boy was not switched on. He was rather and completely unaware of the hints coming his way.

Until 11am, when the attached nursery school had started, all the pupils and staff of the school had turned up and the day was two lessons' old - then he was told in no uncertain terms that his pants were up the flagpole, and had been since the previous night. And everyone else in the known world knew and had been having a rum old laugh, including the head teacher.

Length? The caretakers had to take the whole pole down as the doofus mate had forgotten to keep one end of the string near ground level and has just tied the boxers to one end of the string, so the cretakers found out that the pole was 6m 50cm (perhaps less in the cold). It was more embarrasing than evil - and particularly 'old school' (ba-dum-tish, and *gets coat*).
Cheerio.
(thinkthinkthink ... on ..., Fri 14 Dec 2007, 21:44, 1 reply)

I'm only clicking..
because you used the phrase "having a rum old laugh"

woo.
(Lythium deals in lead, my friend., Fri 14 Dec 2007, 22:54, closed)