It's a really common expression in plateia elef8erias heraklion,Greece.It is said that this phrase dates back to the 19th century and it means that you want to stab someone there at 7pm(aggressively)
xanopia: "hey have you listened to that new maxxant?"
timothy: "nah, put me onto a song"
xanopia: "listen to generic (feat. Katozai)!! It's on all platforms"
In Russian English "maxat" means brilliant, gorgeous and awesome. It's popular amongst russian emigrants in the UK and their children tend to have a mixed language which includes some non-english words.
In the cinema:
American guy: Hey, dude, did ya like the movie?
Rrrrrusian guy: Yes, of courrrrse, it was Maxat!