Meaning

• An average person, usually male, of no particular distinction, skill, or education, often a working stiff or lucky stiff.

  "A Working Stiff's Manifesto: A Memoir of Thirty Jobs I Quit, Nine That Fired Me, and Three I Can't Remember was published in 2003."

• A person who is deceived, as a mark or pigeon in a swindle.

  "She convinced the stiff to go to her hotel room, where her henchman was waiting to rob him."

• A cadaver; a dead person.

• A flop; a commercial failure.

• A person who leaves (especially a restaurant) without paying the bill.

• (by extension) A customer who does not leave a tip.

• Any hard hand where it is possible to exceed 21 by drawing an additional card.

• Negotiable instruments, possibly forged.

Meaning

• To fail to pay that which one owes (implicitly or explicitly) to another, especially by departing hastily.

  "Realizing he had forgotten his wallet, he stiffed the taxi driver when the cab stopped for a red light."

• To cheat someone

• To tip ungenerously

Meaning

• (of an object) Rigid; hard to bend; inflexible.

• (of policies and rules and their application and enforcement) Inflexible; rigid.

• (of a person) Formal in behavior; unrelaxed.

• Harsh, severe.

  "He was eventually caught, and given a stiff fine."

• (of muscles or parts of the body) Painful as a result of excessive or unaccustomed exercise.

  "My legs are stiff after climbing that hill yesterday."

• Potent.

  "a stiff drink; a stiff dose; a stiff breeze."

• Dead, deceased.

• (of a penis) Erect.

• (of whipping cream or egg whites) Beaten until so aerated that they stand up straight on their own.

  "beat the egg whites until they are stiff"

• Of an equation: for which certain numerical solving methods are numerically unstable, unless the step size is taken to be extremely small.

• Keeping upright.