0 a device that people who take part in some sports put inside their mouths in order to protect their teeth and gums :
Gloves on and gumshield in, I jumped into the ring with a former army boxing champ for six minutes of pure hell.
He spat out his gumshield the first time he was knocked down, forcing the referee to order cornermen to clean it before replacing it.
School sports, which once required nothing more from participants than plimsolls and enthusiasm, can now only be undertaken by children wearing gum shields, scrum caps, and shin guards.
