I'm from Britain, and I don't think 'tosser' is used as a derogatory term for 'gay'. It's just a variation on 'wanker':

http://en.wikipedia.org/wiki/Tosser

So, a "Brit" might have called you a tosser, but not because you're gay!

In Jonathan Harvey's play Beautiful Thing, one of the characters uses the term "shirtflaplifter" to refer to a gay, which I think is hilarious...
I also have always loved the term "Nancy Boy, " which was the title of a Placebo song, but certainly didn't originate there.

I've always liked HUNA, which is Hawaiian. Not sure how it's spelled, but voila.

Another Hawaiian term for gay is Mahu.

I always thought that "spear-fisher for doo-doo sharks" was especially creative and even maybe slightly endearing!

Here's a few to add:

Shirt Lifter
Pillow Biter
Hershey Highway
Cake eater
Heels of Helium
Sword Swallower
Sperm Burper

Here's a few from Stuart Allan Jones speech to his family in Queer As Folk(UK)
Because I'm queer. I'm gay. I'm homosexual. I'm a poof, I'm a poofter, I'm a ponce. I'm a bumboy, battyboy, backside artist, bugger, I'm bent. I am that arsebandit. I lift those shirts. I'm a faggot-ass, fudge-packing, shit-stabbing uphill gardener. I dine at the downstairs restaurant, I dance at the other end of the ballroom. I'm Moses and the parting of the red cheeks. I fuck and am fucked. I suck and am sucked. I rim them and wank them, and every single man's had the fucking time of his life. And I am not a pervert.

FOD = Friend of Dorothy
punk
girlyboy
sissy
butt buddy
head cleaner

My favorite is fruitcake (then butt pirate)
But shooot the guy who came up with fudgepacker really does get the prize. I wonder if he was gay.

I've always enjoyed 'mo as in hoMO, (similarly 'ro would apply to the breeders). Butt Dart, is a good one, although that moreso refers to a homo's cock, than the man himself....
I know that way back in like the 1600's they used the term pederast in one or more european contries (definately france).
and of course there's good old fashioned sodomite.
a few random others:
flit, nelly, light in the loafers, limp-wristed, swishy, lady, queen, (or pretty much any feminine royal name like princess or dutchess etc.)

and i think one that's been really popular with Catholics for a while is Father

What about Friend of Dorothy!

Sorry to go a little off topic here, but have you ever noticed how there are tons of slur words/expressions to describe gay people, but only "breeder" springs to mind for the other way? I was once asked (by a straight guy) why that was and I said, "I guess gays just aren't as mean as you straight people."

ass bandit has always been my fave...fruit fly is my fave for my fag hags

poo packer
rump rangler

I've always liked "gaby" for young gay collegiate guys just out of the closet and "baby dykes" for young lesbians.

Chutney-ferret
My personal fave.

Back in college, somebody coined the term "dick smoker" -- which I thought was hilarious.

To ask whether someone is gay: "Is he 'family'?" Which in retrospect was kinda sweet.

I think the most creative thing I've ever been called is "organ grinder".

turd burgler

How about "normal child of God"?

This IS what we all are...aren't we?

Just asking a question... ;)

Tosser is another word for wanker and has no connection with derrogatory terms for gay people.