乐而忘返

Explanation: Very happy, actually forgot to go home. Described as indulging in some cases, reluctant to leave. 　　Usage: Partial official; as the predicate attribute; described linger 　　Source: "Book of Jin Fu Jian mind _set_ on": "Kennedy taste, such as Ye, hunting in the sun, more than ten days, enjoyable." 　　Examples: Recreation Department, whenever there can be, not ten days, is a half months, ~. (Qing Shi Yukun "Chivalric Heroes," the eighty-ninth back) Thesaurus:  to chatter without stop, nag; say over and over again; constantly repeat, Endless luxury luxury, have a nimble tongue, Bored, music amid, yack, talk on and on foolishly and tediously endlessly, garrulous and sharp-tongued, Garrulous Cheap tongue, thousands and thousands of words, Language million thousand words, Shikuchuisheng, One long, one short Antonym Group:  Qixiaruyu, Qitiruyu, banquet of brine, Tisiliulian