Bollocks. (Not to be confused with ‘bollocks!’ – with the higher pitch; indicating an unwelcome surprise or ‘bollocks’ with the lower pitch; indicating extreme dissatisfaction – Cockney, in some instances, can be regarded as a tonal language.)
Do me a favour! – don’t think of me as being so stupid as to believe that.
Are you taking the piss? (This must be differentiated from the statement; ‘You’re taking the piss!’ which shouldn’t be used in an aggressive fashion unless one is prepared for physical confrontation.)
Are you extracting the urine? Favoured by Police, Ambulance and Fire Brigade personnel so as to protect the delicate ears of the media.
Are you taking the mickey? Another euphemism employed to insulate those of refined sensibility from the rough honesty of the everyday world.
Are you extracting the Michael? A recursive elaboration of the above to impress upon the refined that despite one’s rough hewn manner one has a ready wit and a extensive vocabulary superior to that which you gained from your expensive private school you posh bastard.