Trivia: Jim Carrey turned down the role of Dr. Evil in Austin Powers so he could do this movie.
Trivia: In the scene where Carrey is in the stretcher at the airport, if you look in the back of the crowd to the right, you will see Fire Marshall Bill from In Living Color. He can be seen when Carrey's ex-wife is speaking to the officer speaking on a walkie-talkie. (01:16:11)
Trivia: When Jim Carrey goes to his son's school and reveals that he cannot lie, his son asks him some questions, one being "If I make this face will it get stuck that way?", while of course making a funny face. Then Jim Carrey responds with, "Uh Uh, in fact some people make a good living that way". Do you think the second part of the line is in reference to himself? I think so... (00:42:31)
Trivia: The sound that Jim Carrey's head makes when his head hits the floor in the bathroom scene wasn't added, digitally or otherwise. That is the actual sound of his head hitting the floor.
Answer: As you said, he was testing to see if the wish was broken--by going up to an attractive woman and talking to her. While we don't hear what happens, he apparently said something a little too "forward" to her (probably more forward than he would have done otherwise, hence the "not as well as I had hoped"), and got slapped, so he knew that he was still under the wish's effects.
Chanteuse66
But I want to know what he said to the woman.
It's deliberately made unclear what he specifically said, because him getting slapped in the face is the gag that shows the audience that he's still under the spell. If we heard what he said, then we would know right away the new wish wouldn't have worked. It's ultimately up to the viewer's imagination to decide what he told the woman.
Phaneron ★