The Collaborative International Dictionary of English v.0.48:
Bawbee \Baw*bee"\, n. [Perh. corrupt. fr. halfpenny.] A halfpenny. [Spelt also baubee.] [Scot. & Prov. Eng.] [1913 Webster]WordNet (r) 3.0 (2006):
bawbee n 1: an old Scottish coin of little value