Snoop Dogg (Nasus) Trolling my All Chat

So i was just in a game as Leblanc and all of a sudden i started getting messages from Snoop Dogg (Nasus) in All chat. Very peculiar as there was no Nasus in my game and there certainly wasn't a summoner named Snoop Dogg, also, his text was in white and every time he spoke the timestamp displayed [4:20]. I started talking to him and to my surprise he spoke back. I had assumed he was an automated bot put in by Riot (possibly to advertise a Snoop Dogg Nasus skin, as I have seen that floating around the forums multiple times). However, he spoke to us and responded like a normal person, which leads me to believe it may have been a hacker trolling us, or a Riot employee trolling us, due to the nature of his responses it was almost definitely not a bot. Still not sure what his purpose in our game was, but he was pretty funny and dissed the enemy Lee Sin pretty badly, which we all found hilarious. "This Lee Sin sucks for real though." So yeah this could be Riot teasing us about a new nasus skin or we couldve just got hacked, either way, the forums deserve to know, check out the pictures. Oh and hes a TSM fan. "TSM my shit yo!" I apologize for the low picture quality i took the pictures with my phone im trying to increase the resolution or something but if its not clear then hopefully someone else who has this same Snoop Dogg encounter can help out.