It's well-established that Bianca and Chastity aren't exactly the brightest characters, especially at the beginning of the movie. At one point, Chastity says, "I know you can be overwhelmed, and you can be underwhelmed, but can you ever just be whelmed?" Bianca's casual reply "I think you can in Europe," is one of the film's most quotable one-liners.
It turns out that Bianca, though she sounds like she doesn't know what she's talking about, is actually dropping some knowledge. MTV News spoke to Kory Stamper, an associate editor at Merriam-Webster, who revealed that you really can be whelmed at Europe.
The word "whelm" dates back to the 1300s, and originally meant to turn something over. It eventually evolved to mean "placing or throwing something over something else with the intent to engulf it or crush it." While the term has become archaic and is now synonymous with "overwhelmed," a few centuries ago many, many people in Europe would have been whelmed on a regular basis.