A "zinger" is something that is said or done to surprise or shock someone, often by using clever humor or a quick-witted remark. It is a sharp and unexpected comment that catches people off guard. Full definition
Perhaps wary of queries about his family finances, the PM didn't take any questions from the media - but the undergrads managed a few zingers of their own. (totalpolitics.com)
For example, after the third and most fearsome monster triumphantly reveals itself as the ultimate threat, Johnson simply can't help himself from dragging any momentum to a halt with zingers such as (the teased about line at the top): «Well, that sucks,» and «I need a drink.» (freshfiction.tv)
There is much wit and plenty of zingers in Steyn's narrative (not sure if anyone helped him with the technical aspects of this; seems pretty solid). (steynonline.com)