Performed while two people are engaging in 69. The person on top will proceed to shit on the other's face. Thus taking them completely by surprise
Last night me and Mary had the biggest mudslide surprise
by McGuyver Hatchcock December 6, 2006
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When a girl is eating out your ass and you purposely begin to deficate, and then yell "Surprise!!!"
Bradley decided he was going to break it off with Kammy, but before he broke the news he pulled off the Kaluha mudslide surprise...that dirty bastard.
by Stevie Y March 1, 2006
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