plural of trick-or-treater

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

plural of triangular prism

plural of trial balloon

(aeronautics, historical) A small balloon released into the sky to determine the direction and tendency of winds in the upper air before a manned ascent in a larger balloon; a ballon d'essai.

All possible knowledge of a subject matter. / All possible means, both honest and dishonest

(anatomy) The combination of the gastrocnemius and soleus muscles.

Alternative form of triggerman

A fraudster who operates a game of three-card monte.

One who tricks or plays tricks; a practical joker; a prankster