Its Klingon for "come help me raid the enterprise"
Seriously, it could mean more than one thing. Either "Heya, i'm too lazy/shy to say stuff when im trying to be nice so here is a nice expression for your enjoyment" OR "heya, this expression represents me testing the water to see how you feel about me in a potential romantic context. I will make my next move based on your reaction"
OR it could mean something completely different.
I know, I am very helpful.