figurative /ˈwɒləʊ/
To wallow in an emotion or situation is to stay in that state without trying to change:
He was not a fellow to shed tears, or wallow in self-pity.
~ in sth(often disapproving) to enjoy sth that causes you pleasure 沉湎；放纵
She wallowed in the luxury of the hotel.
to wallow in despair/self-pity (= to think about your unhappy feelings all the time and seem to be enjoying them)
陷入绝望；顾影自怜