golpear ligeramente la punta de los dedos en sucesión sobre una superficie

(v.) = tap + fingers

Ex. Some reference librarians tapp their finger(s) on the counter when a request is made and twitch their mouth upon movement to fulfil the request.

* * *

(v.) = tap + fingers

Ex: Some reference librarians tapp their finger(s) on the counter when a request is made and twitch their mouth upon movement to fulfil the request.