n.
1.a sweet colorless, viscous, hygroscopic liquid used as an antifreeze and in brake fluid and also as a humectant in cosmetics and personal care items although it can be absorbed through the skin with harmful effects
Idiom of the Day
keep (something) under one's hat
to keep a secret, to not tell something
My coworker will not say where he is going for his holiday. He wants to keep it under his hat.