a cold fish

cold fish

Someone who shows no emotion and comes across as unfriendly or disinterested. The manager decided not to hire Bill as the store greeter because he came across like a cold fish during the interview.
See also: cold, fish

a cold fish

If you call someone a cold fish, you mean that they do not show their emotions and can seem unfriendly or unsympathetic. Since the President is generally seen as a cold fish, it is all the more impressive when he does show his feelings. He didn't really show much emotion — he's a bit of a cold fish.
See also: cold, fish

a ˌcold ˈfish

(disapproving) a person who shows little or no emotion, or is unfriendly, reserved, etc: When I first met him, he seemed rather a cold fish, but actually he’s quite passionate.
See also: cold, fish