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To denounce speechlessness.
In sponge bob, Squillium and his friends visit what they think will be a crap-o-la fried food stand, but find it to be absolutely fancy-licious. To verbally explain their speechlessness they blurt out in Hamana Hamana Hamana Hamana Hamana's.

Table For Hamana?
by or Keeva December 15, 2011