What is Sarcasm Flag?
1.
(n) any device indicated purely literally, by a change in vocal tone, by a motion, or by an actual tangible object (e.g. a flag) that denotes that the statement(s) made were done so sarcastically and not to be taken literally, often used retrospectively where the notion of sarcasm was lost due to medium of communication or ignorance on behalf of the listeners
I should have raised my sarcasm flag when I told him that he should sleep with my girlfriend.
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