Top Definition
acronym that stands for "Shut the fuck up, loser."

Sometimes pronounced like "stuff-fool"
<ineedfriends0132> my life sux, y won't u guys be nice to me ur so mean plz be my friend :(
<coolguyx1035> STFUL
<ineedfriends0132> :(
* ineedfriends0132 has left the channel
by interwebmanx99 June 06, 2004

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"Shut the fuck up, lamer."

pronounced stuff-full or s-t-f-u-l
next time you see someone acting lame, tell them to STFUL.
by Ananonymousmouse June 07, 2004

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.

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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