Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The weasel in a dream is a thieving, gossiping, corrupt man. Whoever kills one will triumph over a thief or get rid of a bad man.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The weasel indicates a lowly man who spreads corruption among people. Its bite indicates harm from a man with these traits.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The weasel is interpreted as a man of bad character. Whoever sees himself eating its meat is backbiting a corrupt man.