Top definition
It's a Malaysian/Singaporean slang.

It's a feeling similar to buzzkill, or describing someone as a "wet blanket"
A: Sorry I can't make it to the party tonight, something came up!

B: Walao, I was looking forward to partying together, potong stim la you!
by Lysentrix December 22, 2013
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The vengeful act of crapping on a lover's chest while they sleep.

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