The single most important acronym in UK caving (and every other adventure sport in which people suffer needless injury, excitement and post-traumatic stress) is:
SLAGIATT
Probably the most hackneyed expression in the country, excepting "at the end of the day"*.
See other thread(s):
http://ukcaving.com/board/index.php/topic,827.0.html
* You may be surprised (or not!) to hear that "At the end of the day" was already an over-used expression by 1994! - and the dull cliche-mongers are still using it now, 13 years later, as though it's some kind of solemn shibboleth of erudition.