Top Definition
When you expect worse than what actually happens. A pessimist's let down. Can cause happiness and joy, or the anger and frustration brought by a let down.
I seriously expected to do worse on my test. God, what a let up!
by aslan8 December 14, 2005

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to slack off after a period of doing a reasonably acceptable job in an activity.
athletic kid: come on! only 5 more miles!

fat kid: fuck that!

athletic kid: dont let up on me now!
by domiyan November 28, 2012

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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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.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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

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An event in which a situation turns out much better than you expected it to, in contrast to a letdown which is the exact opposite.
We were letup last night when the bleacher tickets we thought we had bought for the basketball game were actually right down by the court.
by Jobo Gusso January 21, 2011

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