n. 图象不稳定

jitterbug \jitterbug\ n.
a fast and vigorous American dance that was popular in the
1940s, having few standardized steps and personalized with
various twirls, twists, and acrobatic moves; it was performed
often to the accompaniment of swing or boogie-woogie tunes.
[WordNet 1.5 +PJC]


jitterbug \jitterbug\ v. i.
to do the jitterbug.
[WordNet 1.5]