Well that was fun! :)
Here's my finished ode - I had to edit it a bit to get it to scan - but thank you everyone for your impressive contributions. I've now ruined this song for everyone forever... Cue sweeping violins :
A -You're an Arsehole
B -You're a bastard
C -left my coochy full of crabs.
D -you're a douchbag
and E you're an eejit
For sleeping with that slutty skank called babs.
G -you're a gormless twat
H - hung like a tiny gnat
I -you're an effing Imbecile
J -you're a jockstrap
K -you're a kinky fuck
L - have a breath of Howard Keel.
M,N,O,P, I could go on all week Q,R,S,T, alphabetically speaking, You're a freak
U made my life a wreck, millstone around my neck
V -volcano zits live on your dick
Wankbadgers are your friends
X- thank god we're at the end
Z - CoZ I have been fucking your friend Rick