• Japanese: 払い忘れる
• Swedish: sjappa

Stiff may refer to:

• Stiffness, a material's resistance to bending
• Stiff differential equation, an equation that exhibits behaviour at two widely different scales (the differential equations describing stiff materials are stiff differential equations)
• Stiff: The Curious Lives of Human Cadavers, a book about corpses by Mary Roach
• Stiff, the first novel by Shane Maloney in his Murray Whelan series.
  • Stiff, an Australian TV movie based on the Maloney novel, starring David Wenham as Murray Whelan
• Stiff pattern or Stiff diagram, a method of plotting anion and cation concentrations in meq/L http://www.id.blm.gov/planning/scmdeis/Appendices/Appendix%203A-6.pdf
• Stiff Records, a British record label
• Stiff also has two uses in professional wrestling:
  • Stiff, used to describe how hard a wrestler is attacking his/her opponent
  • A term used when a promoter does not pay his/her wrestlers (similar to slang regarding tipping)
• A stiff drink can be a drink with a high percentage of alcohol.

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