This little exchange at the beginning of the episode Alien Invasion:
(Drake and Josh are in their room. Drake has the stereo playing really loudly while Josh is trying to do his homework.)
Josh: Hey! Hey!
Drake: (while eating a sandwich) Oh, sorry. Do you want some sandwich?
Josh: No! I’m trying to do my homework! Could you please turn that off?!
(Drake turns off the stereo and picks up his guitar.)
Drake: (singing in blues) Oh cranky Josh, he is getting so cranky, so very cranky... (Josh breaks his pencil out of anger) ...and now he breaks things. Somebody could call to the pencil repayment.
Josh: Could you please stop that improvisation of a blues tune? Don’t you have homework to do?
Drake: My homework is already been taken care of.
(Drake gives a note to Josh.)
Josh: (reading note) "Please excuse Drake from his homework. He twisted his liver and is unable to write, read, or bathe. Yours truly: The Doctor."
Drake: (proudly) Wrote it myself!
Josh: Shouldn't 'The Doctor' have a name?
Drake: Oh, yeah. Here, gimme that. (takes note from Josh and thinks for a few seconds) Bob! "Bob, the Doctor". (writes it down on note) Yeah?
Josh: (sarcastically) Oh yeah, yeah! That is perfect!
Drake: Cool!