An elderly wisconsin woman Sally Baron died last week. The paper said that she often used a slang term including the word whistle to describe a certain person. The reason it made national news is becuase of the fame and controversy of that particular person - apparently W stands for Whistle Ass.
I googled for the article & in WI it must not be too slang becuase they printed it as whistle ass.
I think it means that he (GWB) has spewed so much shit around that his ass whistles.
We’ve got one around here that’s similar but sounds better, “whistle britches” often referred to a kid that likes to tell whoppers and is always getting into shit.
“She thought he was a liar,” Baron’s daughter, Maureen Bettilyon, said. “I think his personality, just standing there with that smirk on his face, and acting like he’s this holy Christian, that’s what really got her.”
…“She’d always watch CNN, C-SPAN, and you know, she’d just swear at the TV and say ‘Oh, Bush, he’s such a whistle ass!’ She’d just get so mad,” Bettilyon said.