Quote Originally Posted by Alex80 View Post
"Валить/свалить" in slang usage is "to run away/leave/retire" in imperfect/perferct forms.
Note, that "завалить" in slang usage is "to kill".
Original meaning is "to lay something down from vertical position to horizontal position".
Он завалил его и потом он свалил оттуда = He killed him and run away from there!