With many compliments to them, and much self-gratulation on the prospect of a connection between the houses, he unfolded the matter—to an audience not merely wondering, but incredulous; for Mrs. Bennet, with more perseverance than politeness, protested he must be entirely mistaken; and Lydia, always unguarded and often uncivil, boisterously exclaimed: "Good Lord!
There are no more uses of "boisterous" in the book.
Show samples from other sources
It is a boisterous crowd, but there is more than enough security.
The one thing I did, though, I was careful ... not to get boisterous or anything.