Fact buddy
A fact buddy is someone who talks your ear off with random facts, and you let them because you’re too lazy to stop them. You both love facts like they’re your spiritual leaders, and you don’t care if you’re the only two people who ever heard of the 17th century.
My fact buddy texted me at 2 AM about the history of the kazoo.
I told my fact buddy that Mars is made of cheese, and he corrected me with a 3-minute lecture on geology.
My fact buddy called me at work to tell me that the moon has a smell.