老千在粤语中是骗子的意思，有组织的集团则称为千门。意思是以千变万化的手段及千方百计的方式，去针对受骗人的心理和信念而施行骗术。

• 偷：偷盗、偷窃
• 讹：虚假陈述
• 拐：拐带，贩卖人口
• 骗：利用受害人的迷信、信仰、好色及贪念等

A card sharp (also cardsharp, card shark or cardshark, sometimes hyphenated) is a person who uses skill and/or deception to win at poker or other card games. "Sharp" and "shark" spellings have varied over time and by region.

The label is not always intended as pejorative, and is sometimes used to refer to practitioners of card tricks for entertainment purposes. In general usage, principally in American English and more commonly with the "shark" spelling, the term has also taken on the meaning of an expert card gambler who takes advantage of less-skilled players, also called an advantage player, without any implication of actual cheating at cards, in much the same way that "pool shark" or "pool hustler" can (especially when used by non-players) be intended to refer to a skilled player rather than a cheater or swindler.