Top Definition
when a person takes a huge shit and stops up the toilet at the local McDonald s and the next person takes a shit in the same toilet .
bobby ran in the mcdonalds to take a shit but too his surprise he ran into a Mississippi log jam
by Mr.PonyCock October 03, 2009

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Perfoming anal sex in the murky, muddy backwaters of sketchy food such as gas station sushi or any Indian dish...
The tandoori wasn't sitting too well but she was really riled up so I Mississippi Log Jammed her in her roomie's bed..,
by LB87 May 24, 2016

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