There is no one word that is slang for old, but there are many expressions that are used to refer to old things, old people, old ideas or someone who holds to old standards or fashions.
Some examples:
a geezer a granny an antique
A grandma is a Bubbe. A grandpa is a Zaide.
In the 1920s, the slang word for grandmother was "granny" or "nana."
baba (loanword from Eastern Europe), gammy, gram, gramma, gran, grandma, grandmom, granny, mimi, nan (British slang), nanna, nanny, Mamaw billyjhen@yahoo.com
Yes, the word "geezer" is considered slang. It is often used informally to refer to an older man, typically one who is portrayed as eccentric or quirky.
In old slang, milkshake mean butt.
As old as language.
If you mean slang as in internet slang, then it means "Certified Old Fart".
old slang for an attractive woman: a bobby dazzler of a vamp
Cheaters are old slang for eyeglasses
Slang oud are 2 words in Afrikaans, with slang referring to a snake and oud referring to old.
Dixie
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.
Old lady is slang that means wife. Off the hinges is a slang phrase that means to be very exciting.
Not always. Colloquialisms are old, common sayings, but slang is often new words and sayings.
OG in slang stands for "old gangsta." Ex. My father thinks he's a OG.
the old ticker