- A viper is a short, rather massive poisonous snake with long front teeth that poison its victims by biting them.
- Synonym: adder
- Don't walk in the bush unprotected, you may be bitten by an viper!
- (pejorative, metaphorical) A viper can also be a person who says bad things on other people.
- This viper of a man will turn all of us mad!
- Viper is a type of car model.