Just looked "boob" up in Webster's, LH. There's 5 definitions, as follows:

boob:

1. a stupid, awkward person : SIMPLETON (short for 'booby', 1909)
2. BOOR : PHILISTINE
3. MISTAKE, BLUNDER (British, 1934)
4. GOOF (British, 1939)
5. BREAST -- sometimes considered vulgar (short for 'booby', 1945)

These are followed immediately by

boob-oi-sie [blend of boob and bourgeoisie] (1922)

: the general public regarded as consisting of boobs


I like the last one best!   :-D