Sigma-algebro or Ï-algebro is a bro who studies probability and measure theory, as Ï-algebra is one of the first things they learn in the field.
Case 1
Bro A: Josh is pulling all the girls, no wonder because he's smart and handsome and works as a quant
Bro B: Yeah Josh is a Ï-algebro
Case 2
Sam had nightmares about Ï-algebra during his PhD, and dropped out of school, he's failed to be a sigma-algebro