What is another word for till blue in the face?
Pronunciation: [tˈɪl blˈuː ɪnðə fˈe͡ɪs] (IPA) 
The phrase "till blue in the face" is often used to describe the act of arguing or trying to convince someone to no avail. There are several synonyms for this phrase, including "until you're hoarse," "until you're dizzy," and "until you're exhausted." Other alternatives include "until you're purple in the face," "until you're breathless," and "until you're tongue-tied." Each of these phrases conveys the same meaning as "till blue in the face," but with a slightly different nuance. No matter which synonym you choose, the message is clear: persistence can only get you so far.
