English

Noun

bad boy ‎(plural bad boys)

1. Used other than as an idiom: see bad,‎ boy.
2. A man whose rebellious nature makes him attractive to women.
3. (slang) A male criminal.
4. (figuratively, slang) An undesirable task.

   Let's get this bad boy done!

5. (slang) A powerful or impressive product or item.
   • 1949 November-December, Low, Floyd E., “Keep that pitch UP!”, in The Instrumentalist, volume 4, Association for the Advancement of Instrumental Music, page 38:

     Many school music teachers and directors are not primarily clarinetists and, knowing little of the subtle intricacies of this "bad boy" of instruments, can teach little more than the fingering.

   • 1988, Writers Forum, number 14-17, University of Colorado at Colorado Springs:

     […] he groaned as he twisted his arm over his head to follow the groove to the right wheel well, "if this bad boy connects right there, then it can't be a light."

   • 1992 November 16, “The POWERstation 220: Here today. More tomorrow. [Advertisement]”, in InfoWorld, volume 14, page 137:

     So isn't it time you took this bad boy for a test drive?

See also

• big boy