It's a catch phrase dating back to 1887, when, in a blatant case of favoritism, British Prime Minister Robert Cecil (a.k.a. Lord Salisbury) decided to appoint his nephew Arthur Balfour to the prestigious and sensitive post of Chief Secretary for Ireland.

So "Bob's your uncle" is another way of saying "your success is guaranteed."
You just put these parts together like this, and Bob's your uncle - you have a working model!

You want to go to the stadium? Go straight on until you reach the park, take the first left, and Bob’s your uncle - you're there!
by Pro-Love Girl September 09, 2010
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Aussie slang term meaning "and there you go", "and then you're done", etc.
To make popsicles, just put juice in an ice tray, put a toothpick in each cell, put it in the freezer overnight, and bob's your uncle.
by korex December 29, 2003
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There you go!
That's it!
Everything is Okey Dokey.
.....it's ready to go...
It wasn't running right, so I cleaned the carb, adjusted the points and Bob's your Uncle!
by Size Queen 7 July 05, 2011
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And Means “there it is,” “there you have it,” or “everything is alright.” Commonly use in the UK and through the Commonwealth. Similar to the French “et viola.”
Magician waves his wand over his top and says: “Abracadabra! Alakazam!” As he pulls the rabbit out he says “and Bob’s your uncle!!”
by Kannath May 08, 2018
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Things are easy. Historyically, comes from when you are related to victorian Royalty. Specifically, Robert Cecil.
Don't like your position in life, get your things, head to the castle, and (remember) Bob's your Uncle.

by andy1234 May 08, 2007
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