My sister used to say to her son, when he was very young, "C'mon Joey, let's beat feet!" or..."C'mon Joey. Let's jet off!"
Well....one day when Joey was about 4, my sis and her hubby were sitting in a Realtors office, with Joey in tow. Joey, being only 4, got very bored with the whole ordeal quite soon and while he tried to be on his best behaviour, my brother in law finally really got a clue, when Joey innocently spouted off..."C'mon dad, let's beat off!"
My brother in law turned beat red, as did the Realtor and my sister couldn't stop laughing!! Joey was just happy they got to leave soon after.