Fun is when some one has the best time of their life
Cameran and My'Lisa had so much fun at the park.
when 2 or more people engage in pleasure
they had lots of "Fun" last night
When something excites you, you put your palms facing foward at around your ribs area, with elbows bent, and you say "FUN".
*sees new shirt in clothing store thats really cute*
"FUN"