A totally coull way to give someone a kiss, when you can't any other way. Seriously. Give it a try. No joke.

Good times to use 'mwah' include, but are not limited to:
> when you're online
> while sms-ing.
> when you're on the phone
> while playing tennis
> while practicing tenor saxophone
> while having lunch
> whilst listening to music:
> classical
> rock
> indie
> house
> metal
> jazz
> opera
> ...
> when on a plane
> when carrying fruit
> whilst jumping
> when eating a muffin
> when under arrest
> when climbing a mountain
> when having dinner with the queen

Yup. Those are pretty much the best times to use it. But it works fairly well the rest of the time, too.

the paticular sound that a fretless bass guitar makes when played.

The sound of a quick kiss when voice is also used.Also the sound of lips smacking in a kissing motion... MWAH.. especially expressive over distances of 10+ metres...one of the nicest sounds, very flirty!

The sound of air kissing (to air kiss both cheeks is "mwah mwah")
Also used to describe a chic restaurant or bar frequented by "beautiful people" (esp. media/fashion/art types)

an online kiss (the sound a kiss would make)

the sound of a kiss often used in internet chat or on the phone often used in a flirty way.

The sound of a "great big kiss"

To make a kissing noise without actually kissing.