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An unopened can of beer floating in a body of water or washed up on the shoreline. Similar to driftwood. Most often found near ocean, lake and river areas where party boats converge. Driftbeer plucked from clean, swimmable water is suitable for drinking after washing or wiping off can exterior.
"Dude, grab that driftbeer!"

"Will do, bro!"
*splash*
"I'm so glad this beach is downwind from party barge city!"
"Yeah, love me some driftbeer."
by Redsquirrelevening June 30, 2014
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