Tl;dr version: Add -y or -ey. Some of these constructions are common: we have a mess, and things can get messy. You can make a joke out of this, too: What’s brown and sticky? —a stick! Some other suffixes can make an adjective out of a noun, such as -some. Trouble, troublesome. But adding that y is the most versatile, I think. It means “having the characteristics of.” You can use it on any noun. Hence the last word in today’s comic, Betty:
This is a good example of how to use an optional hyphen. You can put it in to make the meaning clear.