Get it? It’s funny because the fluffy has no legs at all! Get it? GET IT?!
Oh, you like jokes, huh? Get ready, 'cause I’m about to send your sides to the Andromeda galaxy.
What's the best kind of shading for a drawing of a legless fluffy?
Pillow shading!
I dont get it, but i give you heart, because your pillow fluffy is cute.
A smart guy, huh?
Well, he is polite, so what the hell, he earned himself a warm place and food through the winter, at least.
It’s an English metaphor that refers to being near the point of total collapse/breakdown/coming apart, whether physically (as in am old car engine being on its last legs and about to stop working), mentally (as in a guy working 90-100 hour weeks who cannot take the stress anymore and is on the last legs of his mental health), or both/other (for example, the German Wehrmacht in 1945 was on its last legs in every way imaginable).
The joke, therefore, references both the fact that this fluffy has no legs and the fact that pillowfluffs tend to decline rapidly in mental and physical health.