Causes a person to laugh uncontrollably.
See also TICKLING SPELL (TITILLANDO)
References from the canon
- Harry cast this spell on Draco at the Duelling Club (CS10).
"rictus" L. gaping mouth, grin + "sempra" L. always
CS/f incorrectly shows this spell throwing Draco across the room, and CS/g is similarly incorrect in its effects.