An application of molten asphalt to a roof etc.(noun)
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Use "mopping" in a sentence
"The case went to Theatre soon after that, and leaving a nurse on guard by the man with the facial injuries, Augusta tiredly disposed her little team for what she called mopping-up operations."
"For those who looked to the media for information, traps were continually sprung, and now the journos are engaged in mopping-up operations."
"Whoever takes control, will more likely begin mopping up this mess."