Since it uses the comparative word "as" it is a simile.
The phrase went wrong somewhere, it was always, "cute as a bug in a rug" - meaning 'very comfortable' but someone in the 1940's corrupted it to what you've just said and it's now nonsensical. There's a similar saying, "As cute as a button" and "As cute as a bug's ear" but these
no a simile is when something is like something for example as snug as a bug in a rug meaning comfortable ( and a little humorous )
This phrase is contemporary and a simply internal rhyme with a literal meaning. It is more often heard as "snug as a bug in a rug."
bug rug
Rug, mug, dug, hug, jug, bug, thug rug snug bug come on that's easy!
rug size
hug, bug, lug, and rug
A simile for tight spaces could be "like being crammed in a can of sardines." This comparison evokes the feeling of being tightly packed and confined, emphasizing the discomfort and lack of room to move. Another example might be "as snug as a bug in a rug," which suggests warmth and closeness but also implies limited space.
Bug Rug.
bug rug
gnat mat bug rug
bug, rug, smug that's what i can think now