Well, you DID fake me out and make me check out that link! (Which confirms a jiffy is usually 1/100th of a second, not 100 seconds, though there are some other less-than-a-second uses.)
Not that it's much better than Wikicrap, HERE is another link with similar info. ?
It's my experience that putting something by the curb with a "Free" sign on it just means it will sit out in the weather forever. However, put it out by the curb with a sign that says "$20" and someone will steal it before the next morning! ?