From Longman Dictionary of Contemporary Englishhyperhy‧per /ˈhaɪpə $ -ər/ adjective informal EXCITEDextremely excited or nervous about something No, don’t give Luke any candy – it’ll make him hyper.
Examples from the Corpus
hyper• Sometimes I can be hyper and sometimes I can be reserved, it just depends.• Mitchell had forgotten she chattered a lot, this inflated gaiety, whenever she was hyper or high.• The kids are really hyper today - I think I'm going to send them outside.• Sometimes he gets so hyper you can't talk to him.hyper-hyper- /haɪpə $ -pər/ prefix 1 VERYmore than usual, especially too much hypersensitive (=too sensitive) hyper-inflation a hyper-extended knee2 beyond the usual size or limits a hyperlink (=from one website to another)Examples from the Corpus
hyper-• hyperextension• a hyper-intelligent personOrigin hyper (1900-2000) hyperactive hyper- Latin Greek, from hyper “above” 