arsing about

1) messing about, being a fool
2) doing nothing in particular for a long time

"What have you been doing all day?"
"Arsing about."

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arse about/around

Verb. To mess around, to waste time.

"Stop arsing about and polish the bloody car!"

"Yes mum."

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arse about face

Phrs. Back to front. British origin.

"The whole bloody Tori Party is completely arse about face!"

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arse about tit

Phrs. Back to front. British Origin.

"Ow! My back has been hurting me ever since I fell down the apples and pears arse about tit!

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