Slang can't destroy anything. It's just informal language. However, slang in a business letter can create an unprofessional impression which you want to avoid.
Slang doesn't mean anything special in a letter. You have to know the slang terms, but otherwise, it's just writing.
Slang is only words - it cannot destroy anything. It can, however, make your conversational appear less intelligent and businesslike. A letter should be more formal and less colloquial.
détruire, abimer, and ravager all mean to destroy. I'm not sure if there's another word.
Never
This word "Slang" is an abbreviation of "Sick Language" i.e. SLANG. and in slang "Sick" means "Cool".
Slang is slang It's the s' "LANG " uage.
There is no formal slang. Slang is informal language.
im not telin
Yes, in an informal letter it is OK to use slang.
do away with, end, destroy, eliminate, cancel, ditch (slang)
détruire, abimer, and ravager all mean to destroy. I'm not sure if there's another word.
Chill out is slang for relax and be calm. Cut a rug is slang that means to dance.
Can
foo
Old lady is slang that means wife. Off the hinges is a slang phrase that means to be very exciting.
PITA
shiv
Cap
nope