1. [adjective] Petty, trivial; of little consequence; small and of little importance; picayunish;
2. [adjective] Small-minded: being childishly spiteful, tending to go on about unimportant things.
3. [noun] (US) (especially Louisiana) (archaic) A small coin of the value of six and a quarter cents; a fippenny bit.
4. [noun] (archaic) A five-cent piece.
5. [noun] Something of very little value; a trifle.
6. [noun] An argument, fact, corner case, or other issue raised (often intentionally) that distracts from a larger issue at hand or does not change a primary supposition, outcome, postulate, premise, conclusion, hypothesis, judgment or recommendation.
7. [adjective] (informal) small and of little importance; 'a fiddling sum of money'; 'a footling gesture'; 'our worries are lilliputian compared with those of countries that are at war'; 'a little (or small) matter'; 'a dispute over niggling details'; 'limited to petty enterprises'; 'piffling efforts'; 'giving a police officer a free meal may be against the law, but it seems to be a picayune infraction'.