I don't know about best since all compliment is the best for me buuut i do have most memorable one. 2 years ago in Discord VC on my friend's server, we were talking about games and theories about it and suddenly his friend joined the call to listen, after about 10 minutes listening to us talking, he suddenly unmute himself and call me Лапушка ... I was called Лапушка by a 6'5 muscle tattooed Rusian man, let's just say i was grinning like a madman the entire week