(literary) to wave or brandish a fly-whisk made of deer hair, specifically a [[麈尾|麈尾|zhu3 wei3]]

(literary) a fly-whisk used by a scholar or monk while giving a lecture; by extension, a topic of conversation

a hair duster held by scholars while conversing

A fly-whisk or duster made from the tail hair of a large deer, historically used for shooing insects or as a symbol of status during conversation.

(literary) To talk or chat informally; named after the horsetail whisk used by famous scholars during the Wei and Jin dynasties when engaging in refined conversation, known as [[清谈|清談|qing1 tan2]]