What is a surefire way to tell a girl doesn’t like you?

I have this kind of theatrical, flamboyant way of carrying myself like that of an entertainer on stage at a show for people who came to laugh and be amused (I'm basically like an evolved class clown), so I get to use all kinds of phrases that would be considered outlandish if it wasn't for the fact that people know I'm constantly taking the piss.
So, for example, if I'm sitting with a bunch of friends from med school and some girl, let's call her Emilia, asks:
"Does anyone know what we need to do for [some bullshit class that no one gives a shit about]"
I'll reply:
"My dearest Emilia, sunshine of my life, I do not, but I will move moutains to find out and tell you"
And whether she smiles/blushes or cringes tells me immidiately how she feel about fucking me.

/r/AskMen Thread