Top Definition
if your sister is a lesbian, the act of her scissoring with her partner
hey, i'm coming in, quit sistering!
by unoenglish June 07, 2011

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When you're friends with someone just to meet their hot sister
Why are you hanging out with him, he's such a jerk?
I know, but have you seen his sister?
I get it, sistering.
by H. Archer May 24, 2016

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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).

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A condition where the male partner in a relationship clearly adores or is simply in love with their current partners sister. Given the opportunity all those diagnosed with this condition would instantly embark upon a new relationship with the sibling, at the drop of a hat.
"Ssup, dawg"?
'"I've been a twot! 20 years and I'm still sistering for Nettie. Poor Rene never stood a chance and she's a fucking shrew while I'm at it".
"That's harsh, Bred".
by zebraboy777 May 18, 2016

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.

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