Dobbo is generally the name of a smart person. Also called a "nerd" a "Dobbo" most of the time is also very polite which also brings in the name "sir" or "sire".
Teacher: "(insert name here), you got 100% in your exam."
Other: "what a dobbo/nerd".
Die Mails werden von email@example.com versendet. Wir versenden keine Spammails.