To give unforgetably amazing or brutal oral sex, sometimes referring to deep throating. Thunderkissing is usually given by a prostitute or some other promiscuous female, so using it as a command or suggection would also subtly imply said female was a whore.
1. The act of thunkderkissing.
2 A synonym for cocksucker, also used in the place of slut.
Guy 2: "Yeah, but I have to admit, it was some good thunderkiss."
Guy 1: "Great, now there's no way I'm going out with that thunderkisser."