"I'm not sayin' that's not a good idea, but yer not ter use magic in the Muggle world except in very special circumstances. An' anyway, yeh couldn' work any of them curses yet, yeh'll need a lot more study before yeh get ter that level."
-- Hagrid dissuading Harry from buying a copy of Curses and Countercurses in order to curse Dudley (PS5)
Curses and Countercurses is a handy reference book sold at Flourish and Blotts, useful both for those who wish to annoy others and those who need to defend against those people. The full title of the book is Curses and Countercurses: Bewitch Your Friends and Befuddle Your Enemies with the Latest Revenges: Hair Loss, Jelly-Legs, Tongue-Tying, and Much, Much More (PS5).
On Harry's first visit to Flourish and Blotts, Hagrid had to drag him away from this book (Harry was looking for a way to curse Dudley) (PS5, Pm:SB)
Full Body-Bind (Petrificus Totalus)
Jelly-Legs Curse (Locomotor Wibbly)
Effects: Legs collapse
Leg-Locker Curse (Locomotor Mortis)
Effects: Binds legs
Effects: Pimples erupt
Effects: Sticks shoes to floor
Tickling Hex (Titillando)
Effects: Tickles and weakens
Tongue-Tying Spell (Mimble Wimble)
Effects: Ties tongue in knot
Hair-Loss Curse (PS5)
The book is called Curses and Counter-Curses on Pottermore (note the addition of the hyphen).