Idowu, 29, is the current Commonwealth Games champion, and World and European Indoor champion and Team GB's best hope for gold in the athletics arena.
He jumped 17.58 metres - the furthest in the world this year - in July's trials.
"I feel like Superman. I don't think anyone can stop me. I'm bullet-proof," he said.
A colourful character with hair to match he puts his recent form and fitness down in part to regularly lying naked in the dark in a flotation tank.
The men's triple jump final starts at 1315 BST on 21 August.
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