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When you fuck or jerk off so long and hard that your bedsheets are sweaty and wet and smell like a swamp, also occurs in really hot rooms, sex under the blankets, and in rare cases vehicle back seats
"Hey bro don't sit on my bed I just rubbed one out and got a bad case of swamp sheets"
via giphy
by Krompus_Mcdickenstein June 14, 2018
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