Well its usually a Public School that was created to focus on studies like engineering, agriculture, science, architecture, the vet sciences. Typically they are the leading blue-collar public schools, the schools for the common folk, the salt of the earth citizens. So instead of the uppity people that go to schools like UVA, UNC, Ole Miss, and U of South Carolina.... the land grants of VPI, NC State, Miss State, and Clemson are the schools for the down to earth types. The Uppity Flagships look down on the Land Grants.... as Moo U's.
If you want an more unbiased look..
Land-grant university - Wikipedia
If you see a school with a State or A&M in the name... chances are its a Land-Grant. The Act of 1890 helped establish HBCU Land Grants. In some states, the Flagship is also the Land Grant. Schools like UCONN, Ohio State, Wisconsin, Illinois, Florida, Georgia, Rutgers, Arizona.