adj. 25B6; adjective
the roads are slippery : SLITHERY, greasy, oily, icy, glassy, smooth, slimy, wet; informal slippy.
a slippery customer : EVASIVE, unreliable, unpredictable; devious, crafty, cunning, wily, tricky, artful, slick, sly, sneaky, scheming, untrustworthy, deceitful, duplicitous, dishonest, treacherous, two-faced; N. Amer. snide; informal shady, shifty; Brit. informal dodgy; Austral./NZ informal shonky.