Weird Brag

A term used to describe the occasion when someone says something casually in conversation that seemed a very arrogant thing to say, intentional or not.

A brag that is random, or just weird.

in conversation, to say something, (usually unintentionally), which could be construed as arrogant or bragging. a listener would normally call out "weird brag" and raise their right arm, or just raise the arm without saying weird brag.