Wordnet 3.0
ADVERB (1)
1. 
 with rapid movements; 
- Example: "he works quickly"[syn: quickly, rapidly, speedily, chop-chop, apace]
WordNet (r) 3.0 (2006):
chop-chop
    adv 1: with rapid movements; "he works quickly" [syn: quickly,
           rapidly, speedily, chop-chop, apace] [ant:
           easy, slow, slowly, tardily]