Top Definition
When the person receiving a blumpkin drops a huge turd and the person giving the blumpkin gets a huge splash of shit water on the underside of their chin; When the person giving a blumpkin gets water splashed on their face from a dropping or exploding shit.

Kerplunk + Blumpkin = Kerblumpkin
I need to wash this shit water off my face because my boyfriend gave me a gnarly kerblumpkin.
by BSleepy June 11, 2010

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true love, getting a blowjob while on the toilette
my g/f gave me a kerblumpkin yesterday!
by UsedCarMan August 29, 2005

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.

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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).

Buy the t-shirt