Top Definition
The amount of fries taken by your female significant other, after you've already asked her if she was hungry but she insisted she didn't want anything.
Boyfriend: "Babe, stop eating my fries, you said you didn't want any!"
Girlfriend: "Girlfriend tax; I'm not going to eat all of it!"
by itsonlyaword May 01, 2016

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Liberally interpreted as the price you have to pay for having a girlfriend: taking her out, buying her things, paying for incidentals. Can also refer to the non-monetary price: time, missed opportunities with other women, real/feigned emotional support.
Guy1: Dude you wanna go out tonight?
Guy2: Can't bro, girlfriend tax has me strapped right now.
by Paralytic August 04, 2010

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).

Buy the t-shirt
Obligation to spend twice as much to take your significant other to an event you would have gone to without them.
"Nickelback tickets for a hundred bucks, bro!"
"Two hundred bucks for me, after the girlfriend tax, bro."
"That sucks, bro."
"Would having sex with me make you feel better, bro?"
by dwaynetrobinson April 17, 2015

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

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