To wag one's tongue; to gossip and speak ill of others behind their backs; to backbite.
他总是喜欢在背后攧唇簸嘴，对别人的事情评头论足
He always likes to wag his tongue behind people's backs, commenting on others' affairs.
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To wag one's tongue; to gossip and speak ill of others behind their backs; to backbite.