Top Definition
when a guy is dancing behind an unknown girl , for example in a crowded disco or pub , and He is trying to put his pelvis as close,of the girl's bottom as, he can, following the rhythm of music while He is faking to dance.
Girl: She was onioning so hard on my ass last night! I thought it was gonna go numb!!
by SpanishUrbanBoy September 19, 2016

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When you shoplift from the supermarket by scanning items through the self-service till as an onion (the lowest price item).
In a shameful display of self destruction, depression and sickening greed (potentially malice), pitiful celebrity TV 'chef' Anthony 'The Abhorrent' Worrell Thompson was caught literally red handed onioning a bottle of red wine and some camembert. His family are dutifully shocked.
by jamejame January 14, 2012

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.

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