where you put the wee wee pads on your knickers and you wee wee into them its like a nappy
Show him/her what he/she has done then put in cage or outside for just a few minutes then let them back in keep doing this and they will catch on.
mee mee mee It's from a nursery rhyme. It is "the lasst little piggy."
Eric Partridge records this in his A Dictionary of Slang, 1937, as "Wee-wee, a urination; esp. do a wee-wee" and considers it to be late 19th century.