wild
sow your wild oats: seeoats.
the wild blue yonder: see the wide blue yonder atblue.
wild horses won't drag someone to something: seehorse.
wild and woolly uncouth in appearance or behaviour.
☞ This phrase was originally applied to the American West. The adjective woolly probably refers to sheepskin clothing worn with the wool still attached to it, seen as characteristic clothing of the pioneers and cowboys who opened up the western US.