O.E.
scyrte "skirt, tunic," from P.Gmc.
*skurtijon "a short garment" (cf. O.N.
skyrta, Swed.
skjorta "skirt, kirtle;" M.Du.
scorte, Du.
schort "apron;" M.H.G.
schurz, Ger.
Schurz "apron"), from the same source as O.E.
scort, sceort (see
short). Formerly of garments worn by both sexes, but long in modern use only for men; in ref. to women's tops, reintroduced 1896.
Shirt-sleeve in ref. to "without a coat" first recorded 1566.
Bloody shirt, exposed as a symbol of outrage, is attested from 1586. To
give (someone) the shirt off one's back is from 1771. To
lose one's shirt "suffer total financial loss" is from 1935. To
keep one's shirt on "be patient" (1904) is from the notion of stripping down for a fight.