was percolating
Past progressive conjugation of percolate. There are other translations for this conjugation.

percolate

But even as 'Revenge of the Nerds' was gracing move screens, a different version of nerd-dom was percolating through popular culture.
Pero incluso durante la venganza del `de los empollones honraba las pantallas del movimiento, una diversa versión de los empollón-dom se infiltraba a través de cultura popular.
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