Refers to any instance in a narrative where a dramatic event is forcefully inserted into the plot as a poor attempt to "shock" the audience or "jerk tears."
The event is often times so contrived and ridiculous that it will cause knee-jerk eye rolls and scoffs in audience members who aren't drooling fanboys or girls.
It is a tactic that is primarily seen in the web comic world.
Marilyn: Thank you Heather. But...there's something you need to know.
Heather: What is it?
Marilyn: Before I die of...Lou Gehrig's disease...I have a confession.
Heather: Go on.
Marilyn: I'm a lesbian and I fell in love with you the first time I laid eyes on you. *Tearful blush* ---Actual example from the Spinnerette webcomic
Oh Noes! TEH DRAMA!