Saint Ivel
Named after the British brand of powdered milk 'St Ivel Five Pints'. This describes a lady who is so challenged in the beauty department a man needs to consume five pints of beer before finding her attractive enough to sleep with.
Bob was not very enamoured of the attractiveness of the ladies in the bar. However after a few pints he noticed one that was a Saint Ivel and busted a move on her.