Is it a big deal if I dumped some cooking grease mixed with water outside?

My aunt boiled some ribs last night. She ended up having a pot full of water and grease from the ribs. She asked me to pour it outside in the grass, and I did. Well I just read that it can attract animals and possibly clog up the sewer line. Do you think it will have much of an impact if I did it just once?

Is it a big deal if I dumped some cooking grease mixed with water outside?
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