I am guessing about 1984, called something like Butcher Bob. He had a hatch in shop where he threw scraps, and unbeknownst to him it was mutating into a substance called Balognium… Then aliens arrive to steal it because their ships run on Balognium for fuel…
Anyone else remember this? Corny beyond description but awesome
“Big Meat Eater” (1982)
Quote from the detailed synopsis on IMDb:
“An alien spacecraft arrives in search of a rare fuel - Bolonium - which is deposited in large quantities underneath Bob’s butcher shop.”