Top Definition
A phrase used to describe a stark difference between two things. Similar to night and day, but "day and night" implies things got worse whereas "night and day" implies things got better. Sometimes preceded by "like."
JJ Redick was the man back in college, but now that he's in the NBA, he seems content to be a bench warmer averaging 4 points a game. The difference in his performance has been day and night.

Jake: "Wow bro, it was really light out here around 3 in the afternoon, but now that it's 9:00, it's dark as hell."
Blake: "For real dude. The difference in darkness level is like day and night."
by Nicholas D March 15, 2009

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You're Kidding, right?
The beginning and end of the day.
" First, there's day, when it's light, and night, when it's dark, equals: Day and Night."
by XCallXYouXLaterX June 28, 2009

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt