a good thing to smile is. makes everyone much happier. ^_^

The act of pretending to not care about the constant stream of shit that is your life.

A facial expression . Can be real or fake . Can be happy or evil . A girls smile can be one of the biggest turn ons for men.

it is the key that fits the lock of everybody's heart.

To cause the corners of one's lips to twirl upwards, even if just slightly. Associated with happiness.

Online, to replace the smile, the following smileys are often used: ^_^, :), =) plus other variations. Those can be replaced by a simple *smiles*.

Uncontrollable joy;
A large Uncontrollable grin while having thoughts of pleasure, different from a hard-on because no erection is involved; typically.

Smile is a verb. People do it for some reasons.reason: to show people their emotion wich is happy,excited and normal. lots of people seem to do it but people dont do it all the time.