henhouse n. + Add to list US //ˈhɛnˌhaʊs// UK //hˈɛnhaʊs// hen·house Synonyms Synonyms coophencoop Idioms2 entries01cock in the henhouseA man in a situation where he has access to many women, presumably intending to seduce them.02fox in the henhouseSomeone untrustworthy placed in a position of trust in which they will be harmful, damaging or detrimental for their own personal gain.