All 4 Uses

wallow
in
To Kill a Mockingbird
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I never deliberately learned to read, but somehow I had been wallowing illicitly in the daily papers.
p. 19.9

wallowing = indulging or enjoying
People caught hookworms going barefooted in barnyards and hog wallows.
p. 21.7 *

wallows = mud puddles
But they don't have to go to the courthouse and wallow in it-
p. 243.3 *

wallow = indulge (get overly involved)
A Hot Steam's somebody who can't get to heaven, just wallows around on lonesome roads an' if you walk through him, when you die you'll be one too, an' you'll go around at night suckin' people's breath—†
p. 41.4

Definitions:

(1) (wallow as in: wallow happily in the mud)
to roll about lazily, especially of an animal in mud or shallow water; or the muddy hollow or puddle where it does so
(2) (wallow as in: wallow in self-pity)
to excessively give into a desire (indulge)

This is often said of something negative such as self-pity when no attempt is made to move beyond it. But it can also be used without negative connotation to indicate that someone is enjoying a lot of something such as luxury or rest.
(3) (wallow as in: a wagon wallowed through the mud)
to move with difficulty; or perhaps just to move through water or in a rolling/wave-like manner
(4) (meaning too rare to warrant focus)