Top Definition
This is the opposite of the male "jacking off", a girl masturbating can be referred to as Jilling On.
Jon: "Dude I just caught some girl jilling on in the bathroom!"
Brian:"Wow I love co-ed bathrooms!"
Robcat:"Did she really Jill On? thats hilarious!"
by B-dizzle and J Bird April 22, 2010

The Urban Dictionary Mug

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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.

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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).

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