Large consumptions of coffee can cause nervousness, jitters and a racing heartbeat. It can also cause heartburn.
Figures published today showed that exports of champagne slumped in the first six months of 2009, sending jitters through an industry reliant on its international appeal.
On the face of it, this week's renewed bond-market jitters were caused by growing doubts that an emergency-aid package patched together by European Union leaders last month offers Greece much help.
That prospect makes for jitters and, sometimes, conservatism.
Perhaps a bad first kiss means more than first date jitters—it could also mean a real lack of chemistry.
As it turns out, those jitters you feel after eating a McDonald's hamburger may not just be the contents of your meal eating away at your insides — it's your brain getting stressed out.
In high doses, though, this stimulation can go too far, causing jitters, anxiety and insomnia.
That suggests invest ors may continue punishing Europe's currency, which already is down 14% against the dollar this year, even if Europe's sovereign-debt jitters abate.
This is just a drop in my sea of jitters.
The subsequent catch-up is not due just to a fit of the jitters: Britain maintains its lead when assaults only, minus threats, are examined.
Indeed, the recent jitters need not harm the world economy, which even bears admit has performed stunningly.
There are fewer jitters over the state of Spain's public normal it ain't.
In the rich world the jitters of potential investors are framing today's fiscal debate, even as output remains depressed and bond yields low.
If this continues, so will market jitters.
What lies behind these jitters?