A scoundrel, rascal or unprincipled, deceitful, and unreliable person.
A vagrant.
A plant that shows some undesirable variation.
A character class focusing on stealthy conduct.
An aggressive animal separate from the herd, especially an elephant.
Deceitful software pretending to be anti-spyware, but in fact being malicious software itself.
A mischievous scamp.
Mischievous, unpredictable.
Large, destructive and unpredictable.
Deceitful, unprincipled.
Vicious and solitary.
To cull; to destroy plants not meeting a required standard, especially when saving seed, rogue or unwanted plants are removed before pollination.
One who enjoys creating trouble for others by provoking controversy, for example by revealing facts that others would prefer to keep secret.