The practice of going house to house on Halloween evening to receive treats.

present participle of trick-or-treat

(snooker) An unconventional shot of the balls to show off or pot an otherwise impossible ball. / (video games) a type of shot, often performed with a sniper rifle, to show off a player's skill

(informal, transitive, of a person or thing) To dress or decorate in an especially fancy, elaborate, or excessive manner.

(idiomatic) A shortcut or other quick, or very effective way of doing things, that professional workers learn from experience.

plural of trick of the trade

To allow an advantageous opportunity to pass by.

Alternative spelling of hat trick

An unkind trick. / (in the plural) Unethical or illegal tactics used against an opponent.

(slang) To work as a prostitute, providing sexual services for money.