Similar to that of a rat; as, a ratlike face, ratlike cunning(adjective)
In a ratlike way(adverb)
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Use "ratlike" in a sentence
"PHILADELPHIA-She wished in her personal blog that she could call students "ratlike," "frightfully dim" or "dunderheads" on their report cards."
"“Maybe if you start caring about how you look, I might consider keeping you around when I take over this department, Raquel,” he says, with his usual ratlike smile."
"The whole scene was slightly unsavory, beginning with the ratlike Lemming rifling through things that had actually touched her skin and ending with the hopefully huge check he would write to scoop it all up in his Nike duffel."