Jumpy

Jump'y adjective [ Compar. Jumpier ; superl. Jumpiest .] Jumping, or inducing to jump; characterized by jumps; hence, extremely nervous.
Found on http://www.encyclo.co.uk/webster/J/16

Jumpy

• (superl.) Jumping, or inducing to jump; characterized by jumps; hence, extremely nervous.
Found on http://thinkexist.com/dictionary/meaning/jumpy/
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