bub
The palindrome for 'slang for mister' is 'Mr. top not slang for mister'.
The word "dad" is a palindrome that can be slang for mister.
A slang palindrome for "mister" would be "revver," which is a reversed version of the original word.
bub
bub
bub
Mr. Palindrome could be shortened to "Mr. Pali."
deed
DEED.
A brave and noble person is a hero. The palindrome for what a brave and noble person does is "deed."
A slang term for 'mister' is the palindrome 'bub'.
Deed is one possible answer.