What is Sealthy?
1.
Sort of like stealthy, but in a more drunken slovenly manner.
My buddy sealthy flipped me the bird in the photo I took.
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2.
According to a diet pill company, a mix of sexy and healthy, which is what you achieve when you take their pills.
"Damn, Courtney, you're looking so sealthy!"
"Thanks, it's because of these diet pills I've been taking."
See