Top definition. Ur brother a mother unknown. Any time this is said, Trump gets one inch closer to pressing the nuke button, and God himself falls to the floor and start weeping. This is by far the worst insult you can tell someone in the entire universe. God himself forbids himself from speaking of this.
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Urban Dictionary: Ur brother a mother
On September 27th, Urban Dictionary user submitted a definition for the phrase shown below. On October 8th, , Instagram user largetrap posted a video with subtitle edits to one of the first scenes in the video game Cuphead where the one of the Elder Tea Kettle's lines is replaced with "You'er mom gay" shown below. The cutscenes in this game are beautiful. A post shared by massive chick wit a dick largetrap on Oct 8, at pm PDT.
Top definition. The most devestating insult to ever be invented by humanity. Karl : You look like shit.