talk of the devil

all talk and no cider

All talk and no results.

big talk

Statements which are boastful or exaggerated.

coffee talk

Informal conversation among friends or acquaintances, of the kind that occurs in a casual gathering where people sit together and drink coffee.

dance with the devil

To engage in risky and immoral behavior.

devil dancing

Risky, reckless or potentially immoral behavior.

devil in disguise

A person or thing that appears to be good, honest, or upstanding, but is inherently nasty, evil, or damaging.

devil lies in the details

Synonym of devil is in the details.

folk devil

A person or type of person blamed by the public for various ills, as during a moral panic.