I laughed because I am supposed to but I am not sure I get it ?
I can see the "pig" double-meaning, but why put the "vay" at the end?
Latin: Veni, vidi, vici (I came, I saw, I conquered)
"Old School" Pig Latin: eni-vay,...
English: Pigs can fly. > Igs-pay an-cay y-flay.