Definitions by Zorkkins
Piss in your cornflakes
1. To disprove someone or make them sad. The term is usually used as part of friendly banter or by know it alls
Brian: Jet fuel can't melt steal beams right guys *laughs hysterically*
Dave: No need to piss in your cornflakes mate, but you're not funny
Dave: No need to piss in your cornflakes mate, but you're not funny
Piss in your cornflakes by Zorkkins August 2, 2016