nibble >> ˈnɪb(ə)l
Definition: [verb] take small bites out of.
Example: he nibbled a biscuit
Definition: [verb] show cautious interest in a commercial opportunity.
Example: there's an American agent nibbling
Definition: [noun] an act or instance of nibbling.
Example: I'm distracted by a nibble on my line
Definition: [noun] a show of interest in a commercial opportunity.
Example: I had been trying to unload my apartment for weeks without even a nibble