To exchange something for the exact same thing you traded, or to trade something for the same thing you offered as a trade, or to make something that ends up being the exact same as the source material.
Tinking:
To exchange a dollar for a dollar.
To make gold from gold, or buy (the same amount of gold) with the same amount of gold.
The act of giving monetary reward to cows that have provided good service.
This is particularly common in rural societies, where cows are routinely employed in the service industry. Cows are not entitled to the minimum wage and rely heavily on tips.
'since organising her neighbours to lobby the city council to spend £1m to clean up their area, renovate houses, planttrees and stop fly-tipping...' (Tim Bouquet interviewing Sameen Ali in the Times magazine, 08.03.08)
The Tippinators are a competitive paintball team in Nova Scotia, Canada, who use Tippmann A-5 paintball markers with military simulation modifications to play speedball / airball. The team strongly believes that honesty, integrity, fair play and having fun are more important than the outcome of a game.
I heard about the Tippinators. Aren't they the paintball team that use A-5's, never cheat, always shake hands and just play to have fun?