Flame-free Friday Confessions: on a message board, making a confession to something that may be looked down upon generally. Some boards create a FFFC thread on Fridays where users can make their confessions without (theoretically) being attacked by others.
If you mean slang as in internet slang, then it means "Certified Old Fart".
Garrett mean in cockney slang
Slang is slang It's the s' "LANG " uage.
In old slang, milkshake mean butt.
he means what does being a sponge mean in slang
It is slang for having sex.
Dough is a slang word for money.
Cool itself, unless you are using it to mean mildly cold, is a slang word. Just because it is old slang doesn't mean that it is not still slang.
Tat is also slang for tattoo
''Dill'' means ''idiot'' as australian slang.
Potted is slang for very drunk.
BTM is a slang acronym for "Be There Moment."