free ride

Noun

• An opportunity or benefit which has no cost, especially one enjoyed or undertaken at the expense of others.
• The practice of buying and selling shares or other securities without actually having the capital to cover the trade.
• A hand in which a player can remain without betting further money.

Verb

• To take a free ride; to take advantage of a benefit without contributing.
• To buy and sell shares or other securities without actually having the capital to cover the trade.