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1.
Excellent blue-collar breakfast cocktail, consisting of orange juice and beer. Best prepared with light, American style lager beer (i.e. PBR, High Life etc). Especially popular with post-punk, hipsters.
"Let's drink some beermosa's and then go get brunch at The Chicago Diner."
by ilovemilwaukee January 13, 2008
 
2.
white trash version of the breakfast cocktail, the mimosa. made by mixing high life, the champagne of beers, with OJ.
damn, the beermosa is disgusting.
by Pags January 19, 2004
 
3.
A beer that is usually a alagash white with Orange juice with splash of champagne.
I am eating Tofu and beermosas would be perfect with it

On Sunday brunch we can get beermosas
by Chi-towngurl January 27, 2012
 
4.
Beer for breakfast.
You want a little beermosa with your steak and eggs.
by Chief Fowler July 24, 2008
 
5.
A breakfast drink made by mixing beer (best is lager, like Corona or Beck's) and grapefruit juice.
Dude we had breakfast alert over at Louis' diner we ordered beer, grapefruit juice, and an extra glass to mix the beermosas.
by Francois R. December 20, 2005