arse/fanny

over in the uk an arse is what it is ...your arse ...in the u.s of wtf ....why does the arse suddenly become the fanny ...over in the uk the fanny is well a ladies bits ..there is a saying " blow it out your arse" which means dont be stupid ..what you talking about ...now lets do some transatlantical cross mojination ...okey ...some one says something and you retort ,,"ah blow it out  your fanny" not only do you get the "you utter weird f**k of a carbon lifeform" look ,but also you may be privvy to a slap round the boat and a kick in the preverbial baby making product ....its weird what shit pops into your head whilst sat at your pc contemplating the meaning of life dunt it ? :D