Bob's your uncle

Unknown. Several unsupported theories exist about its origin. A common explanation, involving Arthur Balfour gaining a promotion through the supposed intercession of his uncle, Prime Minister Robert Gascoyne-Cecil, is doubted because the expression did not appear in print until 1924.

• "Insert the plug, press the switch, and Bob's your uncle."
• "You want to go to the stadium? Go straight on until you reach the park, take the first left and Bob's your uncle!"
• "And you're not going to give me that stuff about just shoving over the lever and bob's your uncle. You forget the times the fellow gets caught and has to be kicked off the edge of the trap hole."
• "Click the Import Contacts button and—Bob's your uncle (that's "Tada!" for my readers)—you should see a confirmation that all went according to plan, and your contacts have been imported into your Gmail address book."
• "Simply type in a description of your item and Bob's your uncle: someone, somewhere in the eBay virtual universe will be selling something similar."
• "All you need to do is learn to make these little loops and Bob's your uncle, you're a real live knitter."

• Bob's your father's brother
• Bob's your mother's brother
• Bob's your uncle, Fanny's your aunt
• hey presto
• job's a good 'un
• Robert's your father's brother
• Robert's your mother's brother
• Robert's your uncle
• voilà