v. & n.
v.intr. 1 (esp. of an animal) roll about in mud, sand, water, etc. 2 (usu. foll. by in) indulge in unrestrained sensuality, pleasure, misery, etc. (wallows in nostalgia).
n. 1 the act or an instance of wallowing. 2 a a place used by buffalo etc. for wallowing. b the depression in the ground caused by this. wallower n.
[ OE walwian roll f. Gmc ]