Attaboy, attagirl. Form of praise, often a little ironical, applicable to both sexes (though mainly to men) akin to the standard молодец and красавица.
А по описанию парень все же красава: хладнокровный, циничный, уверенная в себе сволочь вобщем.
According to the description that bloke is an attaboy: cold blooded, cynical, in all a self-confident scumbag.
(bulbao @ ЖЖ, 10/2011)