Riddle

Posted at PFFA.

Riddle

With three of them, the least on top
(One two three, plop plop plop),
They make a man, but in the sun
Drop drip drop they come undone.
If you can't guess my riddle, well,
You don't stand a chance in hell.

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On the Grauheim/Tate Riddle Difficulty Scale, this is a 2.