Here’s the ones I remember. I added spoiler blurs to the really offensive / raunchy ones. Some of these are partially reconstructed from Internet sources but I wrote the parts I do remember in the form in which I remember them.
Learned this at the age of 6 at school:
Deck the halls with poison Ivy
Fa la la la la la la la la
Break the window, pop the tire
Fa la la la la la la la la
Set the teacher’s hair on fire
Fa la la la la la la la la
Learned this really sick one at the age of 7 at day camp:
On top of the schoolhouse
All covered with sand
I shot my poor teacher
With a red rubber band
I went to her funeral
I went to her grave
All the people threw flowers
I threw a grenade
The following day
She wasn’t quite dead
I took a machete
And sliced off her head
I put her in stew
And ate her up
And now my poor teacher
Is nothing but mush
We would sing this one in the school bus when I was 9 when some kid actually or allegedly broke wind:
Going down the highway, Highway 44,
(kid’s name) blew a big one and knocked us out the door.
The wheels couldn’t take it, the engine fell apart,
All because of (said kid) and his supersonic fart.
In Grade 9, I was delighted to find the following two written on the wall of a washroom at school:
O thou cunt, thou dark and dismal slit,
Covered with hair and smelling of shit
Like a cat’s ass thou dost smell bad
But o thou cunt, thou must be had
And
I sat with the duchess at tea
She asked: “Do you fart when you pee?”
I answered with wit: “Do you belch when you shit?”
And I thought it was one-up for me
I also remember a rather weird one, “When Pebbles was a Baby”, one version can be found here. I never memorized most of it, much of it, though, is not particularly raunchy. I do remember this line though: “Ooh, aah! I lost my bra! I left it in my boyfriend’s car!”