Top definition
Large set of testicles; used to describe the perceived guiding force behind a particularly courageous or audacious action undertaken, usually, by a man.
"Standing up to that mugger by himself revealed John had a set of big brass ones."
by JKB - Charleston, SC June 15, 2014
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug