Top Definition
Original Meaning:
To suck on a penis.

But the term has been adapted by youngsters in Sing Ga Pore, they use it more freely, probably in any sentence.
"Go home leh, you go extra classes kum lan ah?"
by singaporean July 23, 2005
not smart, act of stupidity
you very kum lan leh, so easy also dunno.
by Marcus October 19, 2004
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