To gulp down food like a wolf and a tiger
To eat something rapidly and violently
Neutral
To wolf down one's food
None
This is an HSK chengyu
《初刻拍案惊奇》(Chū Kè Pāi Àn Jīng Qí), a collection of novels by Míng (明, 1368-1644) writer 凌濛初 (Líng Méng Chū)
This chengyu is from a line in the work listed in the "Origin" section above