@oristarA,
I don't think so. My grandmother used to say it - she'd say something like, 'I smell somethin' asimmerin' on the stove.'
But she was from Texas. It might be a colloquialism or idiom native to people from a certain part of the country who speak a different dialect than I do.
I would never say 'asimmer' - it wouldn't come naturally to me - but I have heard older, southern (US) people say it outside of poetry and it sounded natural to my ear when they said it.