Top Definition
The act of throwing half-used ketchup sachets onto old ladies' cars. The term is often used to refer to other condiments, although in its original intended form the term does not extend this far.
I can't believe those kids outside the church had the gaul to enter in to a round of schmupping after we so kindly offered them a meal.
by Woowoowoowoo December 13, 2009
Pronunciation shh-muh-ping

The art of idle and unfavourable gossip/bad-mouthing centred around either a celebrity or civilian that is of shared interest to a group of people.
Schmupping targets are usually co-workers, ex-partners, and anyone famous.
by LH8 October 08, 2007
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