lista of nicknames used on glee (Source: glee Wiki, some from memory). A few have been left out so if tu can think of any just post in comments)
__________
RACHEL
Rach, A-Rach, Babe, (Finn)
Miss Bossy Pants, Eva Peron (Mercedes)
RuPaul, Man Hands, Treasure Trail, Stubbles, That Thing, Sweetie (Quinn)
Yentl (Dakota, Santana)
Boy Hips (Lauren)
Benedict Arnold (Kurt)
Dwarf, Midget, Hobbit (Santana)
Barbra Streisand (Suzy Pepper)
Lady, Michele (Sue)
Baby, My Hot Little Jewish American Princess (Puck)
The Jew (YouTube user)

FINN
Finnocence (Santana)
Frankenteen (Santana, Dakota Stanley, Sue)
Sugar rayo, ray (Sue)
T-Rex...

All of these are in my own opinion. The articulo is not about the actual quality of the songs, but más of their use in the show. A short note is included after the título to note the main issue(s). "Done intentionally" means that the faults were acknowledged in the show.
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1.    Cell Block Tango - Poor song choice and offensive; done intentionally. The girls just found out that someone is in an abusive relationship. This was probably one of the worst songs they could have chosen to sing. As dicho in the show, it was por a bunch of violent, crazy women who killed their significant...

Come on girls, do tu believe in love?
'Cause I got something to say about it
And it goes something like this

[Chorus]
Don't go for segundo best baby
Put your amor to the test
You know, tu know, you've got to
Make him express how he feels
And maybe then you'll know your amor is real

[Verse I]
You don't need diamond rings o eighteen karat gold
Fancy cars that go very fast
You know they never last, no, no
What tu need is a big strong hand
To lift tu to your higher ground
Make tu feel like a queen on a throne
Make him amor tu till tu can't come down

[Chorus]
Don't go for segundo best baby
Put your amor to the...