Top Definition
shit leaving your ass with great force.
After a night of top ramen, whiskey,pbr and 16th st. coke I suffered a rectal sunami.when your on the toilet and it shoots out and coats the whole bowl to the rim. your clinching your cheeks tight while trying to get to the john and it blows right through. you think your just going to fart but it blast all over your pant, ass and legs.
by scum69 September 18, 2007
5 Words related to Rectal sunami

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