How did kids get the nickname waffle-longs?

I was outside talking to one of my neighbors who is also a good friend of mine. She said that she and her husband were going to Jamaica in August. I told her I hated her guts and she laughed and said it was the first vacation they’ve planned in years that they didn't have to share with the waffle-longs.

So now I was hurt because I was thinking if she was going to take some friends with her it should be my husband and me and not whoever these waffle-longs people are anyway. I know all my neighbors last names, but that one didn’t sound familiar so I ask my husband who are the waffle-longs and he start laughing! He says the waffle-longs aren’t a who they are a what. Then I asked what are the waffle-longs and he says you know, TWO’s. Okay, what’s a TWO’s, I asked. Then he says, you know kids, it’s a nickname like Tax Write Offs (TWO's), crumb snatchers, lice magnets, tag-alongs, booger eaters, fun killers, noise boxes, stink makers, germ breeders, rug rats, snot factories, and keeps on going with all these outrageous nicknames! Finally I said whoa stop, those nicknames are not very nice. Then he asks, didn’t your parents ever call you any nicknames like that when you were a kid? I said no they didn’t and he just laughed some more!

I get where a lot of those other nicknames come from, especially booger eater, LOL, but I don’t get what waffle-longs is about or why people call their kids that? Does it have something to do with long underwear? Cool Moms like me are supposed to know all this lingo so please help if you know the answer. Thanks! :)