It's not really an idiom - if something is at your heels, it's following close behind you. This means right behind you, almost upon you.
When one makes a proclamation or statement as a true fact, and it is later proved to be wrong, they are said to "eat their words" - they have been humbled by their error.
I think you mean HE HAS TWO LEFT FEET -- everybody has two feet. The expression "two left feet" means that someone can't dance. The image is of someone stumbling because they don't have a matched set of feet, but two left ones instead.
yes she wears blue ones with not that high heels
No, when you see "as ___ as___" you are looking at a simile. Just remember AS = A Simile
it will usually mean to have a gloomy or threating look in ones face.
A "wry grin" is an expression which means the person thinks that something, although not particularly pleasant, is still somewhat humorous. A wry expression is often used when a situation is ironic.
It is a horse-racing term. If you keep control of a horse's head, you control the way that the horse runs, and how fast it goes. Keeping your head means keeping control of yourself and staying calm in all situations.
It's BLOW YOUR OWN HORN. It means to brag about yourself.
Yes, she is. She admitted ones. Especially on her knees, heels and toes.
You are saying you were born or at least raised that way. If you are saying you have anger in your blood, you are either blaming genetics or at least your family legacy. Or it can refer to things that are born talents, or things that you've made second nature. An example would be saying that singing is in your blood.
Black high heels. Preferably shiny ones.
Yes, she admitted ones that she he is ticklish, especially on her armpits and soles, toes, and heels.