What does Genesis 27:11 mean?

Isaac has attempted to pass along his blessing to Esau, the oldest of his twin sons. Instead of giving this blessing in front of the entire family, he speaks with Esau alone, or at least tries to. This reflects the family's extreme favoritism, where Isaac preferred Esau and his wife, Rebekah, preferred the second twin, Jacob (Genesis 25:28). It might also suggest that Isaac knows Esau sold his birthright to Jacob (Genesis 25:29–34), making this an attempt to escape that mistake. In any case, Rebekah overhears and recruits Jacob to participate in a scheme that will trick her husband Isaac into giving the family blessing to Jacob instead of his brother Esau. Before Esau can hunt game and prepare a requested meal for his father, she will make a similar meal and Jacob will take it to Isaac and get the blessing (Genesis 27:1–10).

Now Jacob objects—but not to express a moral or ethical concern with his mother's plan. Instead, he raises a practical concern. He's not a hairy guy. Esau is (Genesis 25:25). It's likely that Isaac will notice this, and what will happen when he catches on? The following verse will reveal that Jacob is deeply worried about the consequences of getting caught trying to fool his father.