A straddle is any set of offsetting positions on personal property. One example, is a put and call option on the same number of shares of a particular security, with the same exercise price and expiration date.
Definition of flack for English Language Learners. : a person whose job is to make people like or be interested in someone or something.
the harsh, throaty cry of a duck or any similar sound. verb (used without object) 2. to utter the cry of a duck or a sound resembling it. Origin of quack1. Dutch.