
When I was a kid I checked out every Peanuts compilation in our elementary school's library. Some of the jokes I got; almost anything having to do with Snoopy is written pretty broadly. Sometimes I was left scratching my head.
One of the things I didn't get had to do with Lucy's proud claims to be a "fussbudget." Not having ever heard of the term (in fact I wasn't even sure if I was pronouncing it right), I had no way of knowing that Lucy was taking inadvertent pride in an insult. None of the compilations I had read published a strip in which it's revealed that Lucy's mother had called her that, or with a comment from Charlie Brown like the one here tipping off the word's meaning, so I had insufficient context for understanding the strip.
While reading strips like this one makes clear to me the point of these strips, it remains that I have never heard the term "fussbudget" applied in a non-Peanuts context.