It is a web site that accumulates texted messages with the theme, "Remember that message from last night that you shouldn't have sent? - We do!"
I laughed out loud for more than a half hour.
Be aware - they are rude, often crude, and very often very funny.
Two as teasers:
"Are you missing anything? I found a wedding ring in my bed this morning..... "
"WTF - it's an $80. bar bill." "Dude, it was dollar beer night....."
Go here --> http://textsfromlastnight.com and laugh.