blind - Man, I think I know where you've heard it. It's a sexual practice in porn, but I wouldn't recommend googling it.

lucya - Yes, that's a Japanese word. In general, it means “to splash with liquid”, and in sexual practice, I can tell you that it means something similar. You can check this dictionary https://www.xlovecam.com/en/dictionary/ and learn many new worlds, and I bet it'll help you one day because there are even videos for these words.