My brother in laws mom had a dream that she was at my place visting and i was sitting there with three cats, one on my lap and one on each side of me and I was eatting popcorn. what could that mean

Well, a cat in a dream can symbolize many different things - femininity, mystery, independence, for example. As a pet, a cat can also stand for a need to care for someone or to be cared for.

The meaning of the cats in that particular dream would depend on how your brother in law's mom feels about you.

Eating in a dream can represent a need to nourish yourself emotionally. Since popcorn is a "fun" food, maybe your brother in law's mom thinks you need to relax and have more fun, or maybe she thinks you already spend too much time having fun and should focus on more serious things.