Source: The Great Interpretation of Dreams (Ibn Sirin)
(By analogy with small predatory animals) A mongoose may indicate a cunning, agile man, or a nimble thief, or a small but harmful enemy.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
(By analogy) It may indicate a man who spies for news or spreads slander.
Source: Signs in the Science of Expressions (Ibn Shaheen)
(By analogy) It is interpreted as a small enemy or a treacherous servant.