pet·ti·fog·ger 
(pĕtē-fŏg′ər, -fô′gər)
(pĕtē-fŏg′ər, -fô′gər)n.
1. A lawyer whose practice involves petty matters or who lacks sound legal judgment or skills.
2. One who quibbles over trivia.
[Probably PETTY + obsolete fogger, pettifogger (probably akin to obsolete German Fugger, successful merchant, usurer, huckster, after the House of FUGGER).]
petti·fog′ v.
petti·fog′ger·y n.