If you can read this, the bitch fell off.
This is wrong on so very many levels, that it leaves one almost sputtering with rage.
The fact that this "gentleman" thought it an appropriate shirt to wear to an elementary school event is actually the least offensive aspect of the shirt. The basic misogyny, the disrespect of women as a whole, and the utter tastelessness and lack of humor involved in wearing this shirt--there are just so many levels of offensiveness.
Overall, I think the wearer of that shirt was utterly unaware of the subtitle that most people probably thought once the shock of the shirt wore off:
I'm not with stupid. I am stupid.
At least, that's what the shirt says to me.