Best Answer - Chosen by Voting
Here are some examples that I think will help answer your question.
http://www.koreangrammaticalforms.com/entry.php?eid=0000001250
from the link above:
"Interjected 말이다 (말 words, talk + Plain Style copula -이다): it is to say = I mean, you-know, you-see, now see here, let me tell ya, uh, that is, I'm tellin' ya."
Other people's answers to this question
http://www.italki.com/answers/question/77523.htm#.UQpb3qXneSp
Also, please note that there are some Korean verb endings that look very similar to this.
For example, see http://www.talktomeinkorean.com/lessons/level9lesson4/
TTMIK Level 9 Lesson 4 / -고 말다
"express something you end up doing or when a certain action comes to an end or is completed after a series of events. -고 말다 is similar to -아/어/여 버리다, but there are a couple differences."
