Coil up into (something) phrasal verb informal
To twist or wrap oneself or something into a certain shape.
When being lost in the forest, I was frightened that I saw a snake coiling itself up into a knot.
The children liked this balloon as it was coiled up into the shape of monkey.
After coming back from work, I saw my cat coiling up into a ball on the rug
The verb "coil" should be conjugated according to its tense.
The idiom is used to say that someone is stupid, unthinking, or inattentive.
When I tell them anything, they look at me like the lights are on, but nobody's home.