From Japanese-English FreeDict Dictionary ver. 0.1:
[ichi1] [news1] [nf03] 犬 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 狗 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, [ichi1] [news1] [nf03] いぬ /ˈinɯᵝ/
1. (noun (common) (futsuumeishi))
dog (Canis (lupus) familiaris)
2. snoop (i.e. a detective, a spy, etc.)
3.
Note: derogatoryloser, asshole
4. (noun, used as a prefix)
counterfeit, inferior, useless, wasteful