recently i saw an airdrop about Penis coin and suddenly when i check etherdelta i saw 80081.350 PNS coin on it. Then i check my mew if it is legit or a bug then i saw it there but the other custom tokens that i add was gone. Do you think this is a hack?
Depends, MEW doesn't show tokens you have no balance on when loading tokens. I doubt you got hacked unless you clicked some fishy link...
Your post is a bit vague try formulating it in a different/better manner.