hairsplitter
hairsp·lit·ter
noun
1.
a disputant who makes unreasonably fine distinctions
Origin
From hair + splitter.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.