Used in response to the ill fortunes of another. Or when something is deemed to have sucked for a friend. Or the punctuation at the end of a well excecuted prank.
Friend A: "Bro, i think i have herpes"
Friend B: "Sucksin."
Creating a massive "hypeness" in a person about something, then deceiving the person by showing him/her that that thing really stinks.
"Wow, this (Name a game that sucks here) looks so cool! I can't wait to get it!"
**Gets game**
"Cool cool cool! Oh, that problem isn't sooo bad..."
**Two weeks later**
"Diz da suxorz d00d -.-"