I believe this expression has an oriental origin where the full form is translated as “It sent me away”, but usually someone “going away” or simple “gone” means “death”.
So, “it sent me” means that something is so hilarious or powerful that it send me to the other world immediately right here right now.
a thing where you link through to something (youtube, a blog, and article etc..) and you see someone has recently left a message "xxxx...sent me here" or "im here because of...xxxx"