absquatulate is also a favourite of mine ever since, some years ago, I was asked by a crossword-addict if there was such a word. I LdIU in the OED at work and was given an etymology that derived the word from "abscond" cross-bred with "squattle."

The latter word, claimed the OED, was used in C19 USA to describe the action of Indians (Native Americans) when they upped tents and disappeared overnight, without any one being aware of their departure.

The main word, absquatulate, was said to be used mainly in respect of people who ran off with money which had been entrusted to them - e.g, the club's treasurer or the bank cashier.