n.
  - a dishonest or unprincipled man. 
▸a mischievous but likeable person.
 - 
[usu. as modifier]
 an elephant or other large wild animal with destructive tendencies driven away or living apart from the herd:
 a rogue elephant.
 ▸a person or thing that is defective, aberrant, or unpredictable.
 ▸a seedling or plant deviating from the standard variety.
 
v.
 remove rogue plants or seedlings from (a crop).
 
  Derivative
  
    
      - roguery n. 
(pl. rogueries)
. 
    
   
  Etymology
  C16 (denoting an idle vagrant): prob. from L. rogare ‘beg, ask’, and rel. to obs. sl. roger ‘vagrant beggar’.