To not go through with something; to not go with or not show up. To bail on a commitment such as a date or promise. (Popular during the '70s..a variation on a wrestling move called a "jap-out" where you escape your opponent.)
"Ok, let's go to the mall tonight, just don't jap out on me." "He always japs out when it comes to paying for beer."
by God1va August 17, 2007

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Top Definition
To go crazy.During World WAR II the Japanese became so desperate to win the WAR that they began committing suicied bombings and flying their planes into U.S ships.
If this nigga Matt keep talking shit I'ma "Jap out" in this mothafucka and beat his ass.
by Jeff Gardley April 06, 2006

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