Anyone can tell me what MK5 means? Is it about the MK5 smart pistol in Titanfall? That's the only thing I can find out relating to SnK on Google after searching for a while.

This says it's short for マジでキレ­る５秒前, which it translates as "on the verge of going ballistic".

279okshap said:

This says it's short for マジでキレ­る５秒前, which it translates as "on the verge of going ballistic".

Thank you. I was never good with abbreviations or slang. Guess it fits.

The 6th picture in the "let's draw villain faces" lineups is always how they would look one second before slaughtering their enemy with the utmost glee.