pettifogger

noun

Etymology: petty + fogger

1. Someone who quibbles over trivia, and raises petty, annoying objections and sophistry.

   “Hence the cunning measure of appointing as ambassador some political pettifogger skilled in delays, sophisms, and misapprehensions, and dexterous in the art of baffling argument.”

2. An unscrupulous or unethical lawyer, especially one of lesser skill.

   “"An inn, or a tavern . . . these are places where greasy citizens take pipe and pot, where the knavish pettifoggers of the law spunge on their most unhappy victims.”

   “This gentleman (for such he was, however strange ladies who class country attorneys with vulgar pettifoggers in fashionable novels may deem the assertion) was the son of a brave officer,...”