v. phrase. British expression for emptying one's bladder. Originally a euphemism used by Royalty but now used generally to mock the upper crust.
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Excuse me Your Highness. I fear it is high time for me to be watering the cricketfield.
Would you like my groundskeeper to help you with that? She's very good with a hose.
I fear not M'am. Jolly good thought though.