British words not used in the USA

Just stumbled across a fantastic Wikipedia entry about British versus American English: List of British words not widely used in the United States. Some of the entries are very interesting (I didn't know Americans didn't use the words abseil, autocue, courgette, fiddly, holidaymaker, invigilator, pushchair, rota, and whinge), and many are genuine, but some of them are hilariously old fashioned. For any Americans out there who don't know better, the average Brit really doesn't use these words any more: argy-bargy, bate, berk, bimble, blimey, boffin, bonce, cobblers, cockle, fettle, flibbertigibbet, gen, gogglebox, gor blimey, guff, higgledy-piggledy, how do, hugger-mugger, manky, mardy, merrythought, mither, mong, nash, overfaced, recce, sixes and sevens, sleeping policeman, spawny, spiffing, spiv, squiz, tonk, trafficator, twee, wojumacallit and yomp.

Also of interest is the List of words having different meanings in British and American English - you can see why George Bernard Shaw would say that Britain and America are "two countries separated by the same language".