" Man, that's really funny ! " as they laugh.
- " Funnny with 3 n's . " is a respond that means,
" Funny , that's more than just funny , its freakin' hilarious ! "
In other words, what just happened is more than just amusing. It is freaky, unique and original.
The expression literally means that the word funny does not do proper justice to the level of ridiculousness
of what just went down, so we'll throw another N in there to make it more weird.
- " Funny ? That was funnny with 3 n's ! "