An expression of approval, fright, surprise, etc.
Cool.
The murmuring sound made by a dove or pigeon.
An expression of pleasure made by a person.
To speak in an admiring fashion, to be enthusiastic about.
To make a soft murmuring sound, as a pigeon.
Used to express emphatic affirmation.
Used to express assent, especially to a male superior.
Term of address to a male; mate; buddy.