As much as desired, to one's fill, without restriction.

Characterized by doing something ad libitum.

At pleasure. / At will. / To whatever extent. / Extemporaneously.

Extemporaneous, impromptu.

To perform without script. / To perform without preparation. / To perform extemporaneously.

(now rare outside set phrases) Pertaining to those arts and sciences the study of which is considered to provide general knowledge, as opposed to vocational/occupational, technical or mechanical training.

One with liberal views, supporting individual liberty (see Wikipedia's article on Liberalism). / (US) Someone with progressive or left-wing views; one with a left-wing ideology.

simple past tense and past participle of light (“illuminate; start a fire; etc”) / simple past tense and past participle of light (“alight: land, come down on”)

(US, dialectal) To run or light (alight).

Illuminated. / (slang) Intoxicated or under the influence of drugs. / (slang) Sexually aroused (usually of a female), especially visibly sexually aroused. / (slang) Exciting, captivating; fun.