The act of overly satisfying oneself usually involving "sin". Such as sex, drugs, alcohol, gambling, greed and glutony.
Alice who had been dieting for two weeks, indulged herself with expensive chocolate.
"This will be a fucking good year (and a good fucking
year), here's to indulgence and 'I missed you' sex," said Morgan as he raised his shot glass after his three month trip to Maryland.
And now that Alice feels bad about eating chocolate she only indulges herself in expensive lingere, which she greedily buys with student loans instead of books.