Green’s Dictionary of Slang

boob adj.

[boob n.2 (1)]

1. (US) unsophisticated, provincial.

[US]‘Hugh McHugh’ You Should Worry cap. 1: We're not a couple of Patsys with the pumps! We can learn enough in two lessons to make good in this Boob community.

2. (Aus.) inferior, second-rate.

[US]H.C. Witwer Kid Scanlon 81: I bet that boob mechanic left that in there.
[US]T. Thursday ‘Sock of Ages’ in Fight Stories Oct. [Internet] Now comes what most folks called the world’s premier boob stunt.
[NZ]H. Beaton Outside In I ii: That’s an ol’ boob joke. Been round longer than I have.