1. One of the most bro forms of headgear. Commonly used as a form of protection against non-chillness (or sissiness).
2. A sombrero made entirely of Natty cans, duct tape, and a sandwich made by a woman.
1. Eric: "Oh shit, brah. That cop just put his siren on! Better pull over..."
John: "Don't worry, I got this, let me put on my sombrerbro."
*cop walks up*
Cop: " Holy shit, brah! Nice sombrerbro! I'll let you guys off free this time" *Brofists*