Water guns/bombs are also used and occaisonally students will hiijack the PA system.
School shirts will often be signed with 'MUD (insert year)'.
student two: I can't wait for our muck up day. Wooo! MUD '11.
The blurting out of random words, catchphrases, or facts that are clearly unfounded or do not exist.
Usually brought on by excessive alcohol consumption and/ or sleep deprivation.
Guy#2- dude, I just read a study that 90% of Americans believed that dinosaurs were killed off by alien invaders.
Guy#1 - Stop with the muds. Let's go. You've clearly had too many beers.
"Dirty, smelly, ugly"
When someone does something really dumb and it's not cool at all.
she's not wearing makeup today.
GIRL:OMG, she's so mud without it."
That guy tried to do a back-flip and he smashed his face in.