scamp1
n.
informal a mischievous person, especially a child.
Derivative
Etymology
C18 (denoting a highwayman): from obs. scamp ‘rob on the highway’, prob. from MDu. schampen ‘slip away’.
scamp2
v.
dated do (something) in a perfunctory or inadequate way.
Etymology
C19: perh. from scamp1, but assoc. in sense with skimp.