birichino = naughty boy

The meaning is related to the saying "tirare su il morale di qualcuno" = to push up someone's MOOD!

You remind me a joke I heard in a movie:
the psychiatrist is showing absolutely innocent Rorschach inkblots to a man:
-What do you see here?
-Sex
-Sex
-Sex... and so on.
After a lot of trials, the psychiatrist says
-But you are obsessed about sex!
And the guy:
-No, doctor, it's up to you: you are showing me just obscene drawings!