"convict," 1956, from yard (n.1) + bird (n.1), from the notion of prison yards; earlier it meant "basic trainee" (World War II armed forces slang).
A hundred dollars; a $100 bill: ''Mac, what you payin' for this?'' Stony looked around the room. ''A yard and ahalf ''
half a yard
[1926+; fr the unit of measure]