A group of scantily-clad coeds. One or more will be taking a selfie at any given time and all will be showing side boob, nipple and/or ass cheek in their booty shorts and tank top.
"Damn, that's the third slut bubble I've seen tonight!"
by Justice Holmes August 9, 2016
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One who gets off to AT memorabilia, and loves the "bubble" of the Appalachian Trail. The bubble being a large grouping of thru hikers.
Strider, the bubble slut, follows the bubble all season long.
by Thruhiker August 6, 2015
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