A quote from the children's book "Guess How Much I Love You", meant to express that one loves another person more than they can imagine.
"I love you up to the moon," said Little Nutbrown Hare.

"Oh, that's far," said Big Nutbrown Hare. "That is very, very far." Big Nutbrown Hare settled Little Nutbrown Hare into his bed of leaves.

He leaned over and kissed him goodnight. Then he lay down close by and whispered with a smile, "I love you to the moon and back."
by momotrickster October 8, 2015
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A clumsy bogan phrase used by Facebook Mums and Daughters to express a quantum of love as a measurement of distance. Has become considerably more popular in recent years (source: Google Trends)
'happy bday to my darling husband colin i love you to the moon and back xxx'
by Sassyplease November 11, 2014
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To love someone all the way around/inside his or her butt and away/out.
Beyoncé: Do you still like me?
Jay-Z: Gril, I love you to the moon and back.
by Mick Phersurani May 30, 2014
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It means to have deep feelings for someone in a special way to show appreciation to him/her.
I love you to the moon and back D.M you are the love of my life and i always want you to know that you are my universe it's self you spin round and round deep in my heart and soul i will and forever love you 1.4.16.
by Your Teddy 1.4.16 May 7, 2017
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