an erect penis that cannot achieve an angle above 90 degrees.
Steve, I hear you have a tremendous dead 90.
by Blau January 02, 2006

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Top Definition
When you have a boner that only shoots straight out at an angle of 90 degrees so that if you are on an elevator and happen to have a boner your weiner tip could hit the button to get to a floor. It points directly straight out like an arrow, their is no limpness, but no curve in the shaft...
Holy shit Paglio, that fat chick was all over your dead 90 last night...better keep that on the dl
by Blau January 06, 2006

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an erect penis in which only shooting out 90 degrees.
"he cant even get it up, and when he does, its a dead 90"
by kevin 09 December 18, 2005

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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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A straight dick that is sharp as a piercing sword.
"Hey Blau, I heard you took it up the ass by Steve's dead 90 last night, i cant imagine how painful that is"
by Blau! January 09, 2006

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Lotsa space for your liquids.

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Your favorite word on a white mug.

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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).

Buy the t-shirt