To be very successful without trying. Basically to be a lucky cunt.
When someone flukes a pot in a game of pool the phrase 'you spawny git' would be appropriate.
a term in golf that means really lucky, eg. after u have hit ur shot it bounced infront and then over the bunker, theres plenty of different situations it can be said in
person1: (hits shot) get over that bunker... yes!!
person2: u spawny bastard, if that was me that would be in the bunker
person1: i guess my golf ball has ears
person2: no ur a spawny bastard!!