In Ireland it means fairies who are evil and come out at night to commit mischief.
As a child my imaginary friend was named poocha. I have had special abilities since I was a child and recently as an adult I researched this word and this is what I found. Although I have never felt affraid of poocha myself. It is still very real to me, not just a childhood friend.
Tonight I learned my grandmother had the same name for her childhood friend. My family says I used to look as though I saw things even though I wouldn't say so, "but I did". I have had blood on walls of my homes and to many occurances to mention. And many encounters with spirits I have seen. I also am constantly asked if I have Indian in me. I have the bone structure of a Native American but cannot find it in my family tree. Although I feel so clothes to their culture and those of native heritage seem to be drawn to me. I have so much research to do on this. I expected the word to be something good. My name could also be used by Indians. I hope none of you are touched by an evil poocha or pooka.
BACKGROUND: the polite way to consume any sauces, dressing, etc. leftover after finishing a meal without rudely slurping them up.