slippery as an eel
Elusive, devious, as in When it comes to talking about his investments, Jim's slippery as an eel. This simile, first recorded about 1412, alludes to the eel's skin, which has tiny scales and is quite slippery when wet.
Words nearby slippery as an eel
slipper satin,
slipper sock,
slipperette,
slipperwort,
slippery,
slippery as an eel,
slippery dick,
slippery dip,
slippery elm,
slippery slope,
slipping rib