The term 'PULLS A FAST ONE ON' is an idiom meaning to deceive or trick someone. The crossword solutions for this term are GYPS (4 letters), SNOWS (5 letters), CONS (4 letters), and SCAMS (5 letters). Gyps is a slang term for a swindler or cheat, while snows is another slang term for the same thing. CONS is short for 'confidence game, ' which is a type of deception in which the perpetrator gains the victim's trust in order to steal from them. Finally, SCAMS are fraudulent schemes designed to take advantage of unsuspecting victims. All of these words refer to different types of deception, and when combined with the phrase 'pulls a fast one on, ' they allude to the act of deceiving someone.