Green’s Dictionary of Slang

1. (US campus) a young woman.

1900

E.H. Babbitt ‘College Words and Phrases’ in DN II:i 23: bid, n. 1. An Irish servant-girl. 2. A woman care-taker at college.

2. an old person.

2003

N. Griffiths Stump 194: It’s probably a pair of bids; typical car for an ahl couple, a green Morris Minor.

3. see biddy n.² (1)