Online Gambling Glossary - U

Underlay - An unwise bet, or a bet whose likelihood of happening does not correspond to the amount of money wagered on it.

Unit - Simplified gambling term to denote the smallest amount of money used in a bet. Using units eliminates the need for calculating actual dollar amounts in their various chip denominations.

Upcard - The dealer's exposed, or face up, card. Opposite of Hole Card.