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A problem which is impossible to solve or extremely difficult to solve.

Or when someone which makes a moment so awkward its difficult to endure.
john: Last night my girl wouldn't let me stick it in her ass,
Paedro: Sounds like quite the swan fuck
john: It was, but i did it anyway and came out looking like a cola icepop
Paedro:WTF, you just swan fucked me
by Flaming Hardon November 30, 2011
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