Definitions of lam:

• noun:   a rapid escape (as by criminals)

  Example: "After the expose he had to take it on the lam"

• verb:   give a thrashing to; beat hard
• verb:   flee; take to one's heels; cut and run
• name:  A surname (common: 1 in 10000 families; popularity rank in the U.S.: #1217)