Fun Fun Time, means sex or masturbation. I made this up as a joke so my friends don’t bother me for a few minutes, or I am actually doing it. So that’s the explanation
*on discord*
bob: BRO GET ON W/ US YOUD BE THE LAST PERSON FOR OUR 5 STACK ON SIEGE!!
Timmy: shut the fuck up bob I’m trying to have my fun fun time go away.