The term 'keyed up' is an idiom used to describe a state of being highly excited, agitated, or nervous. The crossword solutions EDGY (4 letters), HYPER (5 letters), TENSE (5 letters), ANTSY (5 letters), AGOG (4 letters), TAUT (4 letters), WIRED (5 letters), ONEDGE (6 letters), FRANTIC (7 letters), and FEVERISH (8 letters) all describe this feeling in different ways. EDGY implies a feeling of unease, HYPER suggests an energetic state, TENSE implies a feeling of anxiety, ANTSY implies restlessness, AGOG implies a state of excitement, TAUT implies a feeling of tension, WIRED implies a feeling of alertness, ONEDGE implies a feeling of anticipation, FRANTIC implies a feeling of panic, and FEVERISH implies a feeling of intensity. All of these words can be used to describe the feeling of being 'keyed up'.