Best definition
What’s an e-mail?
Intr. 1. an enuendo having to do with titties
2. a question asked that implies titties
3. Viewing or feeling of the

NB while this usually applies to chics, it can be asked by a chic to a dude if she wants him to engage in one of the above definitions

“What’s an e-mail?” said Jake as he reached for Martina’s titties