"The Blob" is a movie that has been twice made, once in the 50s, and again later in the 20th century by horror film director John Carpenter. The story is loosely based (very loosely) on the H.P. Lovecraft short story "The Colour out of Space," and concerns a life-sucking, flesh dissolving blob of protoplasm that arrives inside a meteorite.
If you've read "The Colour out of Space," don't bother seeing either version of the Blob - they twice butchered Lovecraft's artistry.