- any of certain livebearing freshwater fishes of the genus Poecilia (formerly Mollienisia), popular in home aquariums.
- a type of expansion bolt having a split, sleevelike sheath threaded at one end so that when inserted snugly into masonry the turning of the bolt draws the ends of the sheath together, thus spreading the sides.
- MDMA.
- any amphetamine.
- a female mule.
- any brightly coloured tropical or subtropical American freshwater cyprinodont fish of the genus Mollienisia
- an effeminate, weak, or cowardly boy or man
