slew (n.1) Look up slew at Dictionary.com
"swampy place," 1708, North American variant of slough.
slew (v.) Look up slew at Dictionary.com
"to turn, swing, twist," 1834, earlier slue (1769), a nautical word, of unknown origin. Slewed (1801) is old nautical slang for "drunk."
slew (n.2) Look up slew at Dictionary.com
"large number," 1839, from Irish sluagh "a host, crowd, multitude."