be a devil

A phrase intended to encourage someone to do something, especially something they are reluctant or unsure about. Primarily heard in UK. A: "Oh, be a devil and get dessert." B: "But what about my diet?" Now, go on, be a devil and steal the test answers for us! Come on, be a devil and skip that stupid meeting.

be a devil!

said when encouraging someone to do something that they are hesitating to do. informal

Farlex Partner Idioms Dictionary © Farlex 2017

See also:

a ghost at the feast
a racing certainty
a casualty of (something)
a whole different animal
a whole different ball of wax
a whole different beast
(something) to go on
(someone or something) promises well
a fast talker
a/the feel of (something)

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