Cool (PoA, Chap. 2)
HARRY is in his room before the arrival of Aunt Marge.
HARRY (to himself): Boy, boy, Harry, boy
Keep cool, boy
Say that you go to St. Brutus'
Keep your temper, boy
If you make just one mistake
And let something slip
Uncle Vernon will not sign
The form for Hogsmeade
Show Aunt Marge that you're a normal
(But a criminal) boy
Do not listen to her insults
Keep your mouth shut, boy
Just think of your broomstick kit;
It will distract you
And keep it cool, boy
Real cool