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| Date: | 1500-1600 |
| Origin: | slipper 'slippery' (11-19 centuries), from Old English slipor |
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slip‧per‧y
1 something that is slippery is difficult to hold, walk on etc because it is wet or greasy : 
In places, the path can be wet and slippery.Harry's palms were slippery with sweat.
In places, the path can be wet and slippery.Harry's palms were slippery with sweat.2 informal someone who is slippery cannot be trusted :
3 not having one clear meaning and able to be understood in different ways : the slippery notion of 'standards'
the slippery notion of 'standards'4 used to talk about a process or habit that is difficult to stop and which will develop into something extremely bad
(be on) a/the slippery slope
British English informal —slipperiness noun [uncountable]
