From World Wide Words: absquatulate.
To make off, decamp, or abscond.
The 1830s — a period of great vigour and expansiveness in the US — was also a decade of inventiveness in language, featuring a fashion for word play, obscure abbreviations, fanciful coinages, and puns. Only a few inventions of that period have survived to our times, such as sockdologer, skedaddle and hornswoggle. Among those that haven’t lasted the distance were blustrification (the action of celebrating boisterously), goshbustified (excessively pleased and gratified), and dumfungled (used up).
Absquatulate has had a good run and is still to be found in modern American dictionaries. It was common enough that it became one of the favourite bêtes noires of writers on style in the latter part of the century. One such was [continue].