Make No Bones about Something

If you make no bones about something, you’re speaking plainly and telling the truth. For example, if you are honest and admit that you didn’t do your homework, you’re making no bones about it. This expression dates back to the 1500s and some people believe it had to do with soup. If there were no bones in a soup, a person could swallow it without worrying about choking. Likewise, when you make no bones about something, people can feel confident "swallowing" your answer.

source:

http://kidshealth.org/

other links:

Have Your Heart in Your Mouth

Butterflies in the Stomach

Measure wealth