They are always packing their trunk !
A person that likes to tell anti jokes.
Holy moley, I didn't know that!"
They are both gray except for the giraffe.
An elephant can have fleas but a flea can't have elephants !
They love to watch mistakes being made.
With a blue elephant gun. You hold his trunk until he turns blue, then you shoot him with the blue elephant gun Edit: My 5 year old nephew loves this joke.
He usually flies twice as high.
A zebra with a private jet.
Body centered cubic
It packs its trunk and leaves.
Four. Because calling the trunk a leg doesnt make it a leg.
Because they've no pockets to put things in !