An Argentinean way to say you don't have anything to do. Or when a thing doesn't have a purpose.
Example: estoy al pedo querés venir un rato.
Or: está materia está al pedo, no aprendemos nada
paddy pedo is a person that hides in bushes or trees and will be a pedo he also gives you nonsense maths work that nobody can do we don’t like paddy
person 1: hey do u see that in the trees
person 2: omg yeah what is it ?
person 1: ITS PADDY PEDO