hog trough
/ˈhɒɡ trɒf/(also hogs trough, hog's trough, hogs' trough)
noun
1A trough from which hogs eat; a pig trough.
2In ploughing: a trough-like hollow between two furrow-slices.
Origin
Early 16th century. In some forms from the genitive of hog + trough. In some forms from hog + trough.