OHNOFACEPALMPARTY
When something is so facepalm worthy many people use the expression "FACEPALM!" or perform the actual act of facepalming.
Person 1: Look at that girl's Twilight shirt!
Person 1 and 2 in unison: FACEPALM!
Person 2: Dude, that was a total "OHNOFACEPALMPARTY".
Person 1 and 2 in unison: FACEPALM!
Person 2: Dude, that was a total "OHNOFACEPALMPARTY".