The Collaborative International Dictionary of English v.0.48:

Bawcock \Baw"cock\, n. [From F. beau fine + E. cock (the bird);
   or more prob. fr. OF. baud bold, gay + E. cock. Cf. Bawd.]
   A fine fellow; -- a term of endearment. [Obs.] "How now, my
   bawcock ?" --Shak.
   [1913 Webster]