a bandit + old fashion nice guy
No. Nor is it a contradiction in terms - which is what most people mean when they say "oxymoron." An oxymoron is a deliberate rhetorical figure.
A bandit is a robber, a thief, someone who steals
Fire that is cold
Only if you read it incorrectly. Some people interpret least common to mean rarest, which could be considered an oxymoron with multiple.
No, an oxymoron is two words together that mean completely opposite things like big shrimp, pretty ugly, or thinly spread.
George Carlin referred to "military intelligence" as an oxymoron in one of his comedy performances.
I suppose if you take "least common" to mean that there aren't very many of something and "multiple" to mean that there are a lot of somethings, then LCM could be considered an oxymoron. That's not what they mean in this circumstance and it isn't one.
what is an oxymoron for vaguely
There is no antonym to oxymoron
what is the purpose of an oxymoron
1 Armed Bandit
Monsouir means Gentlemen in french