Pues me picasteis la curiosidad y busqué el término... Aquí va la etimología de la palabreja (en sajón, claro)
freak
1563, "sudden turn of mind," probably related to O.E. (Old English) frician "to dance" (not recorded in M.E. (Middle English), but the word may have survived in dialect), or perhaps from M.E. frek "bold, quickly," from Old English frec "greedy, gluttonous." Sense of "capricious notion" (1563) and "unusual thing, fancy" (1784) preceded that in freak of nature (1847). In the 1700s, 'freaked' meant 'covered with spots or colors'. By 1900, 'freak' meant 'irregular' or 'not normal', perhaps in reference to spots of color as imperfections in a manufacturing process. The verb freak out is first attested 1965 in Amer.Eng., from freak (n.) "drug user" (1945), but the verb meaning "change, distort" goes back to 1911, and the sense in health freak, ecology freak, etc. is attested from 1908.
Today, 'freak' has a surprising number of meanings, all coming from the sense of 'irregular', including: an hippie, a drug addict, crazy behavior ( as in 'He freaked when I told him I wrecked his car'), a sexually promiscuous person, an unusually beautiful woman.
http://www.etymonline.com/index.php?term=freakhttp://www.englishdaily626.com/slang.php?142Sir DOC, evangelizando...
