A word describing someone who is not quite a crush, but whom you are still interested in getting to know. I.e. that hot guy you always see in the hall at school, but you don't know his name or what he's like.
Susan: "Meghan said she saw a hot new barista at Starbucks and that she's totally got a crush on him!"
Patricia: "Even if he is hot, she can't already have a crush on him - she doesn't even know anything about him. That's more like a flutter. But I'll go down there tomorrow to see if he really is hot!"
"Fancy a flutter on the 3.00 Derby, Fred? I've got a tip that Elizabeth Green Massacre's going to walk it."
"The one with three legs, you mean? Go on then."
The slapping of the male testicles against the woman's pleasure zone during sexual intercourse.
- In other words when you're having sex and the guys balls slap against the woman