What you call a lot of comments on a post, such as Facebook, between 2-3 people that reads more like a IM conversation; Can slowly change into a topic not related to the post.
Bob Posted: Going to the mall later to buy Kill Zone 3 from GameStop.

Tom: Nice!
Jim: The 3rd one i heard is way better then the 2nd one.

Tom: Really, what's the difference?
Bob: The 2nd ones controls are really heavy and they over did the motion blur.

Jim: Yeah, they really fixed it up. Hey Tom did you barrow Dead Space from me?
Tom: Yeah why?
Jim: I need it back, i am going to trade it in for D.S. 2.
Tom: ok, when can i give it back to you?
Jim: I am in Bld. 10 tomorrow at BCC.
Tom: Can't, i don't have class tomorrow.
Jim: Alright, how about the next day?
Tom: Yeah i can do that. Bld. 10?
Jim: Yes Bld. 10

or: Hey did you see Janes "commentsation" with Brooke.
Yeah, they over took the whole post i put up.
by rocker409 February 15, 2011
Top Definition
When you and another person send comments back and forth on myspace making it into a conversation.
Me and Kaylee had some pretty sweet commentsations today.
by Andy White November 25, 2007
A conversation with out any purpose, just made out of comments and quotes that are not linked
person one:Those people are on the news today.
person two: My backgarden had a bluetit in yesterday
person one:Oh i bought a new television yesterday.

Thats a commentsation
by David2208 April 13, 2008
The act of having a whole conversation using comments. When two or more people feel it's necessary to use the comment section of a photo or video on Youtube, Facebook or otherwise social network instead of just calling one another or using a chat platform.
-That's a nice picture.
-Thank you! How are things Jason?
-Very well. I recently saw you on grandma's album of photographs kissing the dog.
-Oh yes I remember! How is she?
and so the commentsation continues.
by Imthekey November 03, 2013
Commenting back and forth on Facebook to the point where the comments actually don't make sense anymore.

Can be on a wall post, status update, photo etc.
Alright guys, we are officially done with this commentsation. It doesn't even make sense anymore!
by Vagena S. Harry April 28, 2011
When people have a conversation via comments on Facebook or Myspace. on either they're comment-wall or pictures.
-My Fiancee, her cousin and myself had a dumb commentsation on my fiancee's picture on Facebook that wasnt even relating to the picture.

-I have 64 comments from the same person because we decided to have a commentsation and now everyone can read what we were talking about.
by Wick3dR3n3gad3 December 05, 2009
A conversation on Facebook communicated completely through comments on a status, post, photo, etc.
(Friend receiving hundreds of notifications about a status he liked an hour ago)

Anthony: This is the dumbest comment-sation ever.
by Ethan and Anthony NJ October 28, 2011
comment-say-shun, Noun, To have a conversation via Facebook, Myspace, Twitter, etc in the comment area. Usually results in useless notifications to people not taking part in the commentsation.
Hey, maybe this commentsation was a bad idea...
by Googleyes545354378 November 18, 2009
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