There are times when you should request copies of your records: 1  Permanent Change of Station. 2  Deploying. 3  Retiring.
0. EXPERT ANSWER. Double coincidence of wants refers to a situation in a barter system where the goods or services offered by a seller are exactly the same as that required by a buyer and vice versa.
double whammy. noun. Definition of double whammy for English Language Learners. : a situation that is bad in two different ways : a situation in which two bad conditions exist at the same time or two bad things happen one after the other.