"person with a strong desire to dress in clothing of the opposite sex," 1922, from Ger. Transvestit
(1910), coined from L. trans-
"across" + vestire
"to dress, to clothe" (see wear
). Shortened form trannie
first recorded 1983 (in 1960s this was used as a slang shortening of transistor radio
is first attested 1928.