brain leakage
When you have just thought of something completely random and off-topic, and decide to write/draw about that completely random topic.
Man 1: "Hey d00d. Look what I just drew."
Man 1: *shows picture of EPYC Randomness.
Man 2: d00d, that is just pure brain leakage man.
Man 1: I know, right?.
Man 1: *shows picture of EPYC Randomness.
Man 2: d00d, that is just pure brain leakage man.
Man 1: I know, right?.