A pest with a comedy edge, someone that will chase after the opposite sex with poor chat up lines, and will continue relentlessly irrelevant of rejection
Guy: I love you, do you like me?
Girl: No i don't, stop being a treeby and leave me alone
Guy: Ok, i like you
The act of Voluntarily committing a treeb.
Bro G-RoK did u see that dude treeb tha hell out of that treebskee? he treebed like no other treeber has treebed before , Oh thats just as Treeby
yo Holmes i picked up Treebology at UNI