Verbalization of '...' which is the written form of a pause in speech.
Verbalizing the written substitue for a short silence adds a level of sarcasm to the comment (or absence there of.) When used in place of a glare to indicate ignorance, it has the effect of softening the regection.
Can also replace the dramatic pause or a pause to indicate confusion.
Girl: Like, OMG! Gambit is soooo Hot!!!
Someone who thinks she's ridiculous but doesn't hate her enough to hurt her feelings: Dotdotdot.
Girl: Oksoiwaslike standingthereandhewasallike 'Whatever' soiwaslike 'What Ever!'
Anyone else: Dotdotdot?
*standing on your desk with your tie around your head, pretending a cardboard tube is a katana*
Smith (jumping out from behind the cubicle wall with nunchucks made from two soda bottles and some sting): Dot dot dot!
You (stiking a super awsome samarai pose): Hwahh!
dotdotdot is the oral form of "..." People who talk as if they were in a chat room in real life use this word for expressing how stupid their friends are or for saying something stupid and pointless and should be slapped for even talking like so.
It can also be said as "dot-dot-dot" but the odds people these days are going to bother saying "dash" for the "-" are incredibly low.
Dan: I LIKE TO DIP MY BREAD IN COTTAGE CHEESE!
Mandi: LIKE OMG THAT IS SO KEWL!
Dan: U R GHEY!
(Note: Capital letters = Yelling/Shouting)
An uncomfortable or awkward pause in a conversation (usually on an instant messenger) in which one types "..." to annoy another.
Person #1: Wanna hang out?
Person #2: ...
Person #1: Don't you dotdotdot me! Give me a straight answer.
"Did Amy tell you what happened yesterday?"
"No, I asked her on instant messenger but she dotdotdoted me."
Awkward and speechless.
Really distant relative: Hey there wanna play frisbee!?
Teen who could be doing something better: Dotdotdot...