To go crazy and stab the shit out of people. Like "going postal" with a knife. Also, Greyhound's advertising slogan.
Dude had a knife and decided to Go Greyhound on people. The police tased the shit out of him.
by khreng August 05, 2008

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Top Definition
To quietly and calmly lose one's mind, stab someone fifty times, slice bits of them off, consume those bits, decapitate victim, then display the head as a trophy to shocked bystanders. See postal.
Darren is at the end of his rope with the Japanese account. I'm worried he might go greyhound on them.
by Sttocs August 06, 2008

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.

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