Top Definition
anything (action or spoken) done by a boy that us girls thinks is stupid.
He broke up with her for another girl, he's always creating havoc with his boyism.
by E. M. February 26, 2008

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the disease that boys are born with that mentally impair their thinking. concerning mostly sports, girlfriends and alcohol.
Will was diagnosed with boyism when he continuly fucked shit up with his ex-girlfreind Katlyn, like seeing her than decideing he didnt want to two hours later!
by coolchicks November 12, 2009

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