(adjective)
For the last 40 years or so, a term that means something small, tiny. Can be used together with the word itsy-bitsy (see for example the song "Itsy-bitsy teeny-weeny yellow polka-dot bikini").
The nicknames given to idiots who jump around the locker room until their boxers fall down and their small dick is there for everyone to see. (helps if ur last name is sweeny)