To wake up early in the morning (around 2:30 or so) and to realize that you have just had a dream about a person you have many sexual feelings for.
You can also say "237" when this person you have sexual feelings for has the numbers (237) in thier cell phone number
Girl: Damn, i just woke up and had a total 237 about Vinny
Other Girl: Doesn't Vinny have 237 in his phone number?
Girl: Oh Shit