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1.
A fragrance brought on by either spilling a lager or ale on oneself, or having beer spilled on you by friends/strangers. The aroma possesses the intensity of cologne with the scent of beer.
Barney: She knew I was drunk when she smelled my beer cologne.

Ted: Lots of spillage?

Barney: Yes, Ted. I was totally wearing the beer cologne.
by Jerod W. February 05, 2011