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Results found in several dictionaries: Collins, Collaborative Dictionary
méchant, e 
  adj 
  [personne, parole] nasty 
Ne sois pas méchant avec ton petit frère.  Don't be nasty to your little brother. 
  [enfant]  (=pas sage) naughty
  [animal] vicious 
"Attention, chien méchant"  "Beware of the dog" 
  (avant le nom)  
[plaie, blessure] 
nasty

Collaborative Dictionary     French-English
méché exp. highlighted Reverso General Dictionary 
mèche n. 1) drill (f), 2) lock (f) Reverso General Dictionary 
vendre... la mèche vt. give the game away Reverso General Dictionary 
attention chien méchant ! adj. beware of the dog ! Reverso General Dictionary 
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'méchant' also found in translations in English-French dictionary
baddie n. le méchant Reverso General Dictionary 
in cahoots exp. de mèche Reverso General Dictionary 

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