The children ran wild through the park.

In a manner that is uncontrolled or unrestrained, often characterized by a lack of order or discipline.
The horses ran wild across the plains.
His imagination ran wild with possibilities.
The party got a little wild later.
run wild
go wild
wildly successful
unrestrainedly
savagely
furiously
The children were wild with excitement after winning the game.

characterized by a lack of restraint or control; untamed or unrestrained.
The dog was wild and ran freely.
Her hair was wild after the windy day.
The party got a little wild.
wild animal
wild idea
wild west
untamed
uncontrolled
feral