A method of deception that has been used many times before and should therefore be well-known.

(programming) A form of restricted template expansion in C++, characterized by an in-class friend function definition appearing in the base class template component of the curiously recurring template pattern.

(Canada and US, ice hockey) The triple achievement of a goal, an assist for a goal, and participation in a fight, within a single game.

plural of Gordie Howe hat trick

(idiomatic) To know all there is to be known about a certain discipline.

(idiomatic) Synonym of ace up one's sleeve

plural of trick up one's sleeve

(informal)

It is impossible to change people's habits, traits, or mindset.

hard to deal with, complicated / adept at using deception / (colloquial, slang) Relating to or associated with a prostitution trick