Английский Этимологический словарь - fat (adj.)

- O.E. fжtt, originally a contracted pp. of fжttian "to cram, stuff," from P.Gmc. *faitaz. Fig. sense of "best or most rewarding part" is from 1570; teen slang meaning "attractive, up to date" (also phat) is attested from 1951. Fat cat "privileged and rich person" is from 1928; fat chance "no chance at all" attested from 1906. Fathead is from 1842; fat-witted is from 1596.