This headline comes from Associated Press in an article about Marks and Spencers.  The full headline reads, 'Store admits it boobed in bra dispute".   Basically M&S were charging extra for bigger busted bras, to "to include the cost of wider straps and better support".  But customers complained so much that they have now announced they will charge the same price, whatever the size.  To boob means to make a mistake, but a boob / boobs is slang for a woman's breast(s).