How do you spell Brr-man-see?

The spelling you provided, "Brr-man-see," is a phonetic spelling of a word that is likely "Bursa."

"Bursa" is a medical term that refers to a fluid-filled sac that helps reduce friction between tendons, muscles, and bones.

It's possible you might be thinking of something else, but based on the phonetic spelling, "Bursa" is the most likely word.