This was lineart #3 and a bit of an inside joke between and that i just happened to be present for.

Tidma's done a crapload of commissions for Brun, and she writes BRB all over him when she goes to take breaks, so one stream Brun said something like "he's gotten a lot of brb tattoos"

and then bam, i made this quick sketch and he let me ink it for his prize xP

also, yes, he has "tidmatiger" stamped in tiny letters on his ass >_>