After exercise, clubbing or just walking around, the testicles accumulate a certain amount of sweat, or 'wine'. Said fluid is known as 'scrot vino', as in the wine from a scrotum. Vino tasting occurs when a particularly sweaty man cups his testicles, catches a layer of vino and cups someone's nose.
'Ooh, that's some particularly vintage scrot vino'

'Smell my hand'
'Oh, what's that?'
'Scrot vino'

'My underwear smells of vino'
by Wizzleteats April 30, 2006
Get the scrot vino mug.