bang bang
n.— «The brave and dedicated men and women who risk their lives and well-being every moment that they are in a war zone are well aware of the phrase “watch your ass.” They wear helmets and body armor and are always looking over their shoulders. However, the number of news photographers who cover “bang, bang,” as it is known in the trade, are a small minority among the photographers in the business.» —“Watch Your Ass” by Dick Kraus Digital Journalist Aug. 7, 2006. (source: Double-Tongued Dictionary)
Further reading
Mary Beth in Greenville, South Carolina, wonders: Why do we say four-oh-nine for the number 409 instead of four-zero-nine or four-aught-nine? What are the rules for saying either zero or oh or aught or ought to indicate that arithmetical symbol...
Jim in Columbia, South Carolina, has noticed sportscasters’ use of the phrase on the season with reference to a period of time. This construction shows up in the sports pages as early as the 1880s, first referring to a team’s revenue and...