1) Antsy 2) Edgy 3) Harassed 4) Ill at ease 5) Jumpy 6) Nervous 7) Nervy 8) On edge 9) Overstrung 10) Restive 11) Tense 12) Uptight 1) Being in a tense state 2) Edgy 3) Extremely tense and nervous 4) High-strung 5) Highly strung 6) In suspense 7) Jumpy 8) Nervous 9) Nervous and anxious 10) Nervy 11) Overstrung 12) Restive 13) Tense 14) Uptight 15) Wired, so to speak 
adjective characterized by jerky movements; `a jittery ride`