What does knuckle under stand for?

This page is dedicated to explaining the various possible meanings of acronym, abbreviation, shorthand or slang term : knuckle under .

Ever wondered what are all the different meanings of the word knuckle under Or any of the other 1,050,000 slang words, abbreviations and acronyms listed here at Slang? Your resource for web acronyms, web abbreviations and netspeak.

We've found a total of 1 definitions for knuckle under