Brit to SPAM Jargon Glossary

Okay, so I'm the fcuking new guy (FNG) here and an American one at that. I have a lot of British friends, and I thought I was beginning to get a better understanding of the lingo. Now I'm coming across jargon like "septic", and have no clue (SPAM I already saw explained). Any type of glossary for us under-educated types to refer to?
Don't worry if you see someone telling the but party to sit on their helmets and have a fag - it's not what you think.
I will give you a hint....try a google search and then figure out the context.

Not really hard 8O
It is if you're a Petrol tank :D

Catch you later, I'm off to get some Frank down my Greg because I'm Hank
Robbie Redford = Bedford

NAAFI Growler = Sandwich/Burger from the NAAFI or one of the girls that served you with it.

Tech = To**er