The first three words of Leopold Scotch's aka Butters trademark song. Goes:

Loo loo loo, I've got some apples
Loo loo loo, you've got some too...

And ends with either:

Loo loo loo, let's get together
I know what we can do loo loo

or:

Loo loo loo, let's make some applesauce
Take off your clothes and loo loo loo

He sings this when he's playing, doing chores like shoveling snow, practises it to present in the talent show, while he is scared and forcibly made to "play" and on all sorts of other occasions.
Loo loo loo, I've got some apples
Loo loo loo, you've got some too
Loo loo loo, let's get together
I know what we can do, loo loo.
by G.Dawg October 1, 2006
Get the loo loo loo mug.
a girl way beyond dead sexy. shes soo fun and sweet...she makes anyday bright.....when she walks into the room u are drawn to her aora...theres just something about her...the best freind anyone could ask for.
whos that girl....sooooo friggin hot..theres just something about her...shes defly a loo loo
by bekah April 24, 2005
Get the loo loo mug.
A synonym for "out of your mind".
You've gone loo-loo dogg.
by larisa October 10, 2005
Get the loo-loo mug.
A shy creature, varying in size and color, found on a males nether regions. This organism is often found in the morning, standing erect as if to salute the sun.
"Mom! Mom! My loo loo is staring at me again!"
by Spookyghost December 15, 2014
Get the Loo loo mug.
loo loo is a girl also known as aburning beacon of raw sexualityand bekah bo ro. she's the best a girl can be and gosh darn it i want her so effing bad...but sshhh
damn that girl is such a loo loo i wanna be her
by mimi!! April 23, 2005
Get the loo loo mug.