Top Definition
A sarcastic remark about one's comment or failed action. Can be inhanced with 'yeah'. Also abbreviated as ysm.
'Friend fails to kick a ball'
"That was sick mate!"
by BristolianLad October 20, 2013
adj. possessing unique qualities or great value
I just passed a '69 Corvette that looked sickmate, thumpin' down TV Highway
by Honky Dave October 04, 2004

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