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1. mud slinging
the act of fingering a girls asshole instead of their vagina, on accident... bro.
i was petting my dog last night, and ended up mud slinging her.
2. mud slinging
the act of deficating in your hand and throwing it across the room or corridor in an attempt to pelt some one therefor giving them pink eye
nurse-what could have possibly happend that you could have gotten pink eye

you- i know exactly how! billy-joe was mud slinging at me.
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