Big?
Enormous?
Titanic?
Leviathon?
Ha!
Jake's ever expanding form had had outstripped all of these descriptors and more long ago, and by the time his godlike expansion finally began to slow there were simply no words for what he had become. He existed on a cosmic scale, beyond all human conception. He had thought himself a god, and now he was something more. Even he could scarcely believe what he had become, gazing upon his own transdivine form in awe and worship.
Every inch, every foot, every mile of his body was packed with power beyond anything dreamed of in the history of the universe. Even if he'd stood the height of a normal man he would have been impossible: even to his scale his chest was over five feed wide, his shoulders wider still. His unflexed biceps were over twice the size of his head, with enough power in his arms to tear a star in half and hurl it screaming and sputtering into the far reaches of infinity. His genitals were beyond obscene, his testicles nearly half the size of the rest of his body, his penis half again as long as he was tall-- and not yet fully erect. His deep purple cockhead was several times the size of the Earth.
Suddenly the truth of his new form began to dawn on him. The ultimate strength. The absolute power. His penis began to harden, and threw the earth into darkness...