Impatient a. : Not patient; not bearing with composure; intolerant; uneasy; fretful; restless, because of pain, delay, or opposition; eager for change, or for something expected; hasty; passionate; -- often followed by at, for, of, and under.

Impatient a. : Not to be borne; unendurable.

Impatient a. : Prompted by, or exhibiting, impatience; as, impatient speeches or replies.

Impatient n. : One who is impatient.

Example:
How does an Impatient person lose weight?

Taxonomy
Merriam-Webster Online Dictionary, Dictionary, webster, delay, Word Games, tient, Webster Online Dictionary with audio pronunciations, Middle English, thesaurus, glossary, language, ESL, Search, nt, adjective, Etymology, Anglo-French, Latin.

Defination from the web:
impatient from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... 1 a : not patient : restless or short of temper especially under irritation, delay, or opposition b : intolerant 1 <impatient of delay> ...