资料来源 : Webster's Revised Unabridged Dictionary (1913)

Jumpy \Jump"y\, a. [Compar. {Jumpier}; superl. {Jumpiest}.]
   Jumping, or inducing to jump; characterized by jumps; hence,
   extremely nervous.

资料来源 : WordNet®

jumpy
     adj : being in a tense state [syn: {edgy}, {high-strung}, {highly
           strung}, {in suspense(p)}, {jittery}, {nervy}, {overstrung},
            {restive}, {uptight}]
     [also: {jumpiest}, {jumpier}]

jumpiest
     See {jumpy}