П-99

БОЙКОЕ ПЕРО (у кого) NP sing only usu. VP subj. with бытье or obj of иметь) ( s.o. has) the ability to write easily and well: у X-a бойкое перо - X wields a clever pen X has a lively pen.

«Тут он немножко кольнул вас. Но сознайтесь, какое бойкое перо» (Гоголь 3). "Неге he has a go at you a little. But you must admit he wields a clever pen!" (3a). "That's a slight dig at you. But you must confess that he has a lively pen!" (3d).