Hummeln im Hintern haben
to have ants in one's pants; to be unable to sit still
Origin
An animal alliteration after the restlessly buzzing bumblebee; Martin Luther already noted bluntly "Er hat humel ym arse" (he has bumblebees in his backside).
Building blocks
Words in this expression
Examples
Das kann keine stillsitzen, es hat Hummeln im .
The child can't sit still for a minute — it has ants in its pants.