The lawyer for famed choreographer Wade Robson tells TMZ, Michael Jackson was a "monster" who sexually abused Wade for seven years as a child ... and threatened him if he ever went public. Robson's lawyer, Henry Gradstein, tells TMZ, "Last year, on a career trajectory that was off the charts, he [Wade] collapsed under the stress and sexual trauma of what had happened to him for seven years as a child." Robson spent many weekends with Jackson at Neverland Ranch and his other homes in L.A. and Vegas between ages 7 and 14. Gradstein goes on ... "He [Wade] lived...