n. 小钱币, 五分钱币, 微不足道的事物, 无足轻重的人

a. 微不足道的, 不值钱的, 琐细的, 眼光狭小的, 小气的, 可鄙的

[ adj ]
(informal) small and of little importance
<adj.all>
a fiddling sum of moneya 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

Picayune \Pic`a*yune"\, n. [From the language of the Caribs.]
A small coin of the value of six and a quarter cents. See
{Fippenny bit}. [Local, U.S.]