as slippery as an eel (奸诈狡猾)_俚语惯语

as slippery as an eel
奸诈狡猾

i'm hesitating whether to buy the computer from that salesman.
（我还在犹豫要不要跟那个售货员买计算机。）
don't trust him. he's as slippery as an eel.
（别相信他。那家伙狡猾得很。）