If you happen to be some type of linguistic savant, you've probably already figured out that the term literally translates to "dragon fodder." We're not sure if the "dragon" is in reference to the wife herself or is more figuratively referring to her wrath, or for that matter whether the "fodder" is in reference to actual food (the term is sometimes said to specifically refer to chocolates) or to what the husband's dick is going to end up as if he doesn't have something real nice in his hand when he shows up looking like Pig-Pen from Peanuts (except surrounded by a cloud of alcohol vapor instead of filth).
What It Means:
The momentary consternation you feel when you go to introduce someone and realize that you've forgotten his or her name. Can also function as a verb.
It's happened to the best of us. You're at a party (you social butterfly, you) when an old buddy from high school approaches you. "Hey, Steve, you old bastard!" he says vociferously, because for the purposes of this illustration your name is Steve. "Who's this with you?" And that's when, as you turn to introduce him to your date, you realize that you've completely forgotten this guy's name. Did it start with J? Or K? Why is "Aloysius" ringing a bell? You really should remember, because you spent not-insignificant chunks of your adolescence trying to score cheap convenience store beer by his side and holy shit, what kind of an astronomical asshole is he going to think you are for forgetting his freaking name?
"Dude, seriously? We have the same name."
You, dear friend, have just tartled all over yourself. And apparently the Scottish know this feeling better than anyone, because they've coined a one-word term for it (we have to assume this is somehow related to the fact that they also have a variety of whiskey named after them).
To wrap things up with a continuation of our theme of partying and alcohol, here's a little word-association trick for you: Imagine you're throwing a soiree at your place, when Sean Connery unexpectedly shows up. He saunters up to you as only a former 007 can saunter, glances toward his date, and then says, in his big-ass Scottish brogue, "Pardon my tartle." Now, imagine you misunderstood him and he's actually apologizing because his date is an anthropomorphic shelled reptile who just dropped a long, slow deuce on your brand-new carpet.
"Did you have to yell 'Cowabunga!' while you did it?"
You may still forget people's names left and right, but we can now guarantee that "tartle" is one word you'll never forget.
Related Reading: Did you know there's a Japanese word for a beautiful girl, if only viewed from behind. There's also a German word for the excess weight from emotional overeating. Prefer filthy foreign phrases? We've got those too.