Usually abbreviations stand for many different things. In this case it is most likely that LTR stands for "Long term relationship" which is used to indicate the "marital status" of a relation on social media sites.
does a Finn in slang money terms mean "five"?
The acronym BDD can stand for many things. In slang terms, BDD can mean a Before Dinner Drink. However, it can also mean the Bureau of Disability Determination.
The slang terms I'm familiar with are: P.I. Private Eye, Peeper and Dick
There aren't slang terms for people's names.
The acronym DWD could stand for many things. Two possible meanings are Dying with Dignity, or Driving While Drunk. DWD also stands for various slang terms and abbreviations for cartoon characters and popular songs.
Later - goodbye.
does a Finn in slang money terms mean "five"?
In slang terms, "KO" is often used to refer to a knockout or knock out in combat sports when one fighter is unable to continue the fight.
The slang word "preggers" means pregnant. It is clearly derived from the word pregnant. The word is perhaps not used as much as it was some years ago as other slang terms have competed for air space.
The acronym BDD can stand for many things. In slang terms, BDD can mean a Before Dinner Drink. However, it can also mean the Bureau of Disability Determination.
Some slang terms for arsonist are firebug, torch, and pyro.
Meanings are limited to slang
The slang terms I'm familiar with are: P.I. Private Eye, Peeper and Dick
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The internet has multiple definitions for the acronym OTN. Definitions vary by profession. The most widely used are the slang terms "On the Net " and "On That Note."
Restroom IS a slang term. Click on the related question
There aren't slang terms for people's names.