After having sexual intercourse, a Friendly Welshman occurs when you wait for your partner to fall asleep, take a shit in their bed, and sneak out, never to see them again.
If things gowell tonight, this broad may be getting a "Friendly Welshman "
Wiping your arse with your hand, when you run out of bog roll.
" I will not shake your hand, you 'av done ze Welshman's Wipe!" - The real reason Arsene Wenger refused to shake Mark Hughes' hand after the Man City v Arsenal Carling Cup game of 2009