When a person taking about eating massive amounts of food at all you can eat, for hours on end. But then stops before finishing their first plate when the time comes.
"You better not John out again at the buffet tonight, that's just tossing your money away"
a phrase derived from the occasion when one man, who many now know, flopped out his cock to kids at his fat sons sleepover. It is now used when anything is got out,collected,passed and most definitely, flopped.
'OI, Dave, I hear you have a saggyminge, john it out !'
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi