Did you mean: indulge, indulgent, indulgence, inductee?

flip-flop (n.)[flip-flop 词源字典]

also flip flop, "plastic thong beach sandal," by 1970, imitative of the sound of walking in them. Flip-flap had been used in various senses, mostly echoic or imitative of a kind of loose flapping movement, since 1520s:

Flip-flaps, a peculiar rollicking dance indulged in by costermongers, better described as the double shuffle; originally a kind of somersault. [Hotten's Slang Dictionary, 1864]

Flip-flop in the general sense of "complete reversal of direction" dates from 1900; it began to be used in electronics in the 1930s in reference to switching circuits that alternate between two states. As a verb by 1897. Flop (n.) in the sense "a turn-round, especially in politics" is from 1880.[flip-flop etymology, flip-flop origin, 英语词源]

indulge (v.)

1630s, "to grant as a favor;" 1650s, of both persons and desires, "to treat with unearned favor;" a back-formation from indulgence, or else from Latin indulgere "to be complaisant." Related: Indulged; indulging.

over-indulge (v.)

1741, from over- + indulge. Related: Over-indulged; over-indulging.

pet (n.1)

"tamed animal," originally in Scottish and northern England dialect (and exclusively so until mid-18c.), of unknown origin. Sense of "indulged child" (c. 1500) is recorded slightly earlier than that of "animal kept as a favorite" (1530s), but the latter may be the primary meaning. Probably associated with or influenced by petty. As a term of endearment by 1849. Teacher's pet is attested from 1890. Pet-shop from 1928.

Know nature's children all divide her care;
The fur that warms a monarch warm'd a bear.
While man exclaims, 'See all things for my use!'
'See man for mine!' replies a pamper'd goose:

[Alexander Pope, "Essay on Man"]

pettish (adj.)

1550s, "impetuous," evidently from pet (n.2) in its "ill humor" sense + -ish. Meaning "peevish, easily annoyed" is from 1590s.

It has naturally been assoc. with PET sb.1, as being a characteristic habit of a "pet" or indulged and spoiled child; but the connexion of sense is not very clear or simple .... [OED]

Related: Pettishly; pettishness.

spoiled (adj.)

"over-indulged," 1640s, past participle adjective from spoil (v.).

Three Rs (n.)

1824; said to have been given as a toast by Sir William Curtis (1752-1829), a beloved lord mayor of London in the 1820s, who seems to have been a figure of fun to whom many mangled phrases were attributed. Among the toasts he is alleged to have given at public dinners were "The Female Ladies of London;" "The three C's--Cox, King, and Curtis;" and "The three R's--Reading, Writing, and Rithmetic."

It has been very much the fashion amongst a class of persons to attribute to Sir W. C. ... a vulgarity and ignorance of speech which are by no means consistent with his character and conduct. The worthy and hospitable baronet has a rapid mode of speech, but it is always correct ; and although some eccentricities are mixed up in his composition, he is highly honourable, and has been a very useful member of society, particularly to his London constituents. ["The Mirror," Jan. 29, 1825]

After listing some examples, the article continues:

It is, however, very certain, that at a city festival some years ago, having indulged very freely, he fell asleep, when some wag, choosing to consider him dead, wrote his epitaph, which was found next morning pinned to the baronet's dress coat:--

"Here lies the great Curtis,
Of London, Lord May'r:
He's left this here world,
And gone to that there."