Well, honey, "owah tagu siam" doesn't mean a darn thing in any language I know of. Sounds like someone's playing a little game of mix and match with their words. Maybe they meant to say something else, who knows? But as it stands, it's just a bunch of gibberish.
You chant the magic words "OHWA" "TAGU" "SIAM" loudly and repeatedly. It helps if you do it where all your friends can hear.
Find a large, crowded room, go to the exact center, stretch your arms over your head and, while waving your hands wildly, dance around in a circle intoning the magic phrase "OWAH TAGU SIAM." Or, if this question does in fact have anything to do with actual science, please be more specific in your question.
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Thailand was previously known as Siam.
Rodents.
Fasting.
Tagu
A native of Siam (now Thailand)
Tabuu is a stupid evil guy.
Oh, what a goose I am!
Siam.the old name for Thailand was Siam
siam means fast