In case you hear someone saying that he wants a Yard of USD, if will sound a little funny. But, Yard is a slang word, now considered a buzzword, short for a "milliard", i.e. one billion of any currency (1,000 million). Thus, it has an interesting aspect. For example, if in a forex market, one wants to buy a billion of USD, he would say that he wants to buy a yard of USD instead of using a billion USD. This ensures that the seller does not mistake a billion for a million.
It actually comes from Dollar/Yen. The first currency where a billion was referred to as a yard because of the alliteration yard of yen.