nicky-tam (n.) Look up nicky-tam at Dictionary.com
also nicky tam, "garter worn over trousers," 1911, from Scottish, from shortened form of knickers + Scottish & northern English dialect taum, from Old Norse taumr "cord, rein, line," cognate with Old English team (see team). Originally a string tied by Scottish farmers around rolled-up trousers to keep the legs of them out of the dirt.