- Hyperactive or unusually energetic: eating sugar makes you hyperMore example sentences
- Whenever his friends or family were around he became extremely energetic and hyper.
- Next week will see the gates of Unionism come crushing down, be prepared to see the siege mentality go into hyper speed.
- The long car ride and Red Bulls we had pounded left him hyper and a little crazy.
1940s: abbreviation of hyperactive.