2) A car that has no performance modifications on it. Most street racers who race with American muscle cars or high end European sports cars claim that their "stock" cars will beat any "moded" import from Japan. 99 times out of 100, they are right.
1) Yes, Mr. Smith, that item is in stock. OR Sorry, Mr. Smith, we're out of stock for that item.
2) Little Billy tried racing a stock Geo Metro against a stock Ferrari.