• Bummer SUV, an SUV build by Tatonka Products
• [Bummer]http://albuscav.us/blog/?p=143, a giant sculpture by Myk Henry installed at the Burning Man 2008
• Bummer Vacation, a SpongeBob SquarePants episode
• Double Bummer, a double-LP by Bongwater
• Major Bummer, a comic book published by DC Comics
• Bummer (dog), famous San Franciscian dog from the 1860s
• Derogatory term for Homosexual
• An expression of disappointment; an unpleasant or disappointing experience

(ei)- Cole had a bad day, he woke up hungover, was shot in the eye with an airsoft gun (went blind), and broke up with his girlfriend of 1 year, 7 months, and 7 days. It was a bummer.