Top definition
a) doing something very stupid
b) blowing all your money on a particularly poor hand of poker

Named after a relatively infamous London gambler, who was a minor Metro celebrity for several weeks and well known for a deluded self belief that he could play poker well.
'Man, I just lost all my cash at poker!'
'I was doing a Ravi!'
'You spaz'
by DougieTempleton September 27, 2006
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