1) A little button on Facebook used to express a positive response about someone's status, picture, video, link or pretty much anything else a person does.
2) The same button can also be used sarcastically.
Note: It is not dissimilar to the little "Thumbs-Up" picture next to each definition on Urban Dictionary.
1) Ash: "I just bought myself a new phone! :)" (23 minutes ago)
*you click on Like Button*
You like this.
2) Ash: "I just lost my phone! :(" (3 minutes ago)
*click on it again*
You and 7 others like this.
An annoying feature in Facebook that allows people to positively acknowledge a post, image, or video without actually engaging in any form of meaningful conversation or dialogue.
Person #1's Facebook status update: "Man, I wish people would take the time to actually post meaningful comments on the stuff I post instead of just pressing the Like Button"
Person #2 and 3 others like this
Person #1: "God dammit!"