"unscrupulous lawyer," 1843, U.S. slang, probably altered from German Scheisser "incompetent worthless person," from Scheisse "shit" (n.), from Old High German skizzan "to defecate" (see shit (v.)).
shutter-bug
shuttle
shuttlecock
shy
Shylock
shyster
si
sialo-
Siam
Siamese
sib