He decided to drop his brief when the case became too complicated.
Он решил бросить его, когда дело стало слишком сложным.
Definitions
To 'drop (one's) brief' is an idiomatic expression, primarily used in British English legal circles, meaning for a barrister to withdraw from a case or to cease representing a client, often suddenly or unexpectedly. The 'brief' refers to the set of instructions or documents given to a barrister for a case.