Dream Yacht

An extremely attractive person of the opposite sex that you'd like to have sex with but can't because he or she is taken or is way out of your league causing you to day-dream about being on them naked, riding until the sun comes up during spring break

The opposite of a moped

Example:

Guy 1: did you see that gorgeous woman at the bar last night?
Guy 2: hell yeah, I'd show her off to everyone I know. She's my Dream Yacht.

Example:

It's too bad Tyler is married. Hes so hott! He is my dream yacht.