Penis enlargement ?

You would have to get a transplant. I know a guy named John Wayne Bobbit who has one for you or anyone. 

His is in the photo.

A surgery called adadicktome.

Surgery.  Penile enlargement surgery is expensive, but it works.

A hallucinogen might make it look bigger

Not a damned thing.

there is no such thing - you can get an operation to increase length (it has risks though, if it goes wrong you might be known as mr floppy)

You can get surgery to make it longer or attach weights to your penis but both have shown to have high risks of damage and erectile disfunction, non of the other ones work

hope for a larger one when reincarnated

Smash it with a hammer and watch it swell into a much larger size.  Repeat until the desired length/girth is achieved.  

Losing weight helps to reduce the fat in the public area, so exposing more penis length. There is an operation to artificially extend the exposed  area of the penis but it can leave disfiguring scars that make it less likely you will want anyone to see it. There are various things people will sell you to attach weights to your penis or to use a vacuum pumps to enlarge it but the effect is only temporary. There are no devices, pills or potions that have been shown to permanently increase penis length.