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.
Definition of knack for Students. 1  1 : a natural ability : talent She has a knack for making friends. 2  2 : a clever or skillful way of doing something : trick Skating is easy once you get the knack.