Definition - The excessive use of affected archais — such as tush — by historical novelists.

Example -
Cedric tushed and pshawed more than once at the message. (Walter Scott, Ivanhoe, xl[i]v)

Etymology -
The word was coined by Robert Louis Stevenson to denote a style of romance that used these archaisms excessively.
Note: The word tush is an archaic term denoting "scoffing" or "impatience."

Oxford English Dictionary -
Its first citation is from 1883:
"It's great sport to write tushery."
(R. L. Stevenson I Let. to Colvin Oct. (1899))

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