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It is when someone tells you something and you don't believe it whilst it will never happen. Mostly used when people lie all the time.
guy1:hey dude i fucked a girl
guy2:no way man

10mins later

guy1:dude man i really fucked a girl
guy2:srsly dude thats multi-bull
guy1:oh yeah how?
guy2:your fat and ugly

guy1:well

guy2:and remeber that time when u said that a girl gave you a bj, that was also multi-bull cuz ur penis is so short xD
guy1:oh stfu
by [x]Media400 May 20, 2009
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Apr 22 Word of the Day
When you eat dirt for the first time and leave your family to build a shack in the woods
Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak
via giphy
by ecogoth December 30, 2020
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