What Does IDK, LY, TTYL Mean

Mrs. Khanna of my society messaged me “Hi… I m new on whatsapp.. Any idea what does IDK, LY, TTYL mean…?”

I replied: “I don’t know, Love You, Talk To You Later !”

She replied: “No problem. I’ll ask my son.. Love you too.. “

and my wife read it.

s……..a……….t……….t………..a……….a……….k

saala, bhalaai ka to zamana hi nahi raha.