"Pestilential" is a word in ENGLISH

pestilential ENGLISH
Definition:

Hence: Mischievous; noxious; pernicious; morally
destructive.

pestilential ENGLISH
Definition:

Having the nature or qualities of a pestilence.

Few words of positivity

All are lunatics, but he who can analyze his delusion is called a philosopher.

Ambrose Bierce, The Collected Writings Of Ambrose Bierce

WORD SUGGESTIONS
Laugh your heart out.

Why didn't the monster use toothpaste? Because he said his teeth weren't loose.

rogue ENGLISH

One who is pleasantly mischievous or frolicsome; hence, often used as a term of endearment.

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shrewd ENGLISH

Inclining to shrew; disposing to curse or scold; hence, vicious; malicious; evil; wicked; mischievous; vexatious; rough; unfair; shrewish.

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