Definition of Niggling

Adjective: niggling nig-ling

(informal) small and of little importance
"a dispute over niggling details";
- fiddling, footling, lilliputian, little, piddling, piffling, petty, picayune [N. Amer], trivial, piddly

Verb: niggle ni-gul

Worry unnecessarily or excessively
"don't niggle too much over the grandchildren--they are quite big now";
- fuss, fret
Argue over petty things
"Let's not niggle over pennies";
- quibble, pettifog, bicker, squabble, brabble