For what it's worth, I believe they're called A-Shirts when you buy them in packages from Hanes or Fruit of the Loom. I've never heard that in conversation, though. I've always heard them called wifebeaters, distasteful as that is.
BTW, thanks, Labrat! I hadn't thought about deelyboppers in years, but I was the proud owner of several pairs as a kid. They were right up there with those super-attractive feather clips and T-shirt slides...
