Stiff (disambiguation)

Stiff may refer to:

• stiff differential equations – equations that exhibit smooth behaviour, then sudden changes
• Stiffness – scientific explanation
• Stiff can also be used as a slang word for when a customer fails to tip a server.
• Stiff also has two uses in professional wrestling.
  • Stiff (professional wrestling) – Used to describe how hard a wrestler is attacking his/her opponent.
  • Also a term used when a promoter does not pay his/her wrestlers.