when you fuck something up, sometimes so bad people could die, and often without knowing you've done it. after you've "done a roberts" you try and hide the problem, normally causing even more shit for others.
i asked kwik fit for new brakes, they done a roberts and fitted a battery.
i ordered a clutch for my golf, the bloke done a roberts, sent me a damm alternator!
my cousin wanted a refund, the shop done a roberts, and charged him twice for his shit
my boiler pissed water over the floor, plumber's done a roberts, and its gone up like a leaking gas main