What is the ruling on eating meat served in university restaurants under the name of "halal," and is drinking the broth and discarding the meat considered wasteful and unlawful?

The phrase "slaughtered according to Sharia (definition)" is sufficient to deem it permissible, unless there is evidence to the contrary, as the default rule for meat is permissibility. The broth follows the meat in terms of permissibility and impermissibility, so it is not permissible to consume broth made from meat that was not slaughtered according to Sharia.