When a girl is on vacation and her tits are out to play - roaming free, feeling the breeze, that fresh vacation air. AKA no bra.

The term for when a girl reaches second base with another girl.

Whilst tossing a vegan males salad he tittyfucks his female partner.

An expression applicable to a wide variety of situations in place of any more vulgar or appropriate sayings. ( primarily as a noun )
Can also be used as an exclamation totally irrelevant to the following sentence.

When a womens tits havnt been perky since the super Nintendo was released.

To have the courage and will to overcome a lack of motivation.
To become motivated.

As there is a slap ass Friday, there is now a tap tit Monday all you do is tap their tit (if they are a girl)