[SierraWasp]

He talks big... Then flinches at the last minute over and over again!!! He'll wait till the last second and then flinch about running for another term leaving the CAGOP very high and very dry!!!

He's flinched on over 90% of his supposed promises, especially if you weight them accourding to their magnitude!!! He's the biggest FLINCHINATOR in the universe! Isn't that "fantastic?"

[calcowgirl]

I think CapitulATOR may fit better:

flinch
INTRANSITIVE VERB:     Inflected forms: flinched, flinch·ing, flinch·es
1. To start or wince involuntarily, as from surprise or pain. 2. To recoil, as from something unpleasant or difficult; shrink.
NOUN:  An act or instance of starting, wincing, or recoiling.
ETYMOLOGY:    Obsolete French flenchir, of Germanic origin.

flinch
NOUN:  An act of drawing back in an involuntary or instinctive fashion: cringe, recoil, shrink, wince. See APPROACH, SEEK.
VERB:   To draw away involuntarily, usually out of fear or disgust: blench¹, cringe, quail, recoil, shrink, shy¹, start, wince. See APPROACH, SEEK.

capitulate
INTRANSITIVE VERB:     Inflected forms: ca·pit·u·lat·ed, ca·pit·u·lat·ing, ca·pit·u·lates
1. To surrender under specified conditions; come to terms. 2. To give up all resistance; acquiesce. See synonyms at yield.
ETYMOLOGY:    Medieval Latin capitulre, capitult-, to draw up in chapters, from capitulum, chapter. See chapter.

capitulate
VERB:   To give in from or as if from a gradual loss of strength: bow¹, buckle, submit, succumb, surrender, yield. Informal : fold.