Um...I stand by my usage of the superlative form of fun. At least since I didn’t write it over 100 years ago. In fact so does Scott-Foresman who develops the reading/grammar texts adopted by my county. When using multi-syllable adjectives such as “beautiful”, you use “more” for the comparative and “most” for the superlative forms (more beautiful, most beautiful). But on one syllable words you use -er for the comparative and -est for the superlative (hot, hotter, hottest).
But let’s look elsewhere. This from The Grammarist website says...
“Some English traditionalists claim that the only correct comparative form of the
adjectivefun is
more fun, that the only superlative is
most fun, and that
funner and
funnest are only appropriate in the most informal contexts. This rule might once have been justifiable, but today it is obsolete, and it lives on only because not enough people have dared break it. This is beginning to change, as the one-word forms have gained ground in recent decades and have even worked their way into edited writing, but there is still a long way to go.”
Even 100 years ago it would be perfectly acceptable in informal text. And I’m talking to herdman and you can’t get more informal than that. (Go ahead and challenge my starting a sentence with “and”.)
Let’s look at Grammarly....
“Fun, the Adjective
As early as the 1900s, people were using
fun as an adjective in speech and informal writing. People use it to describe things or people relating to fun. Sometimes, it describes things that are whimsical. Many people, perhaps most people, strongly prefer
more fun and
most fun as the comparative and superlative forms of
fun.
Still, plenty of others label things funner and funnest. Many dictionaries acknowledge this use, but still label the adjective form as informal. Here are some examples of
fun used as an adjective.
Morris is a fun guy.
Keith is more fun than Bjorn.
Keith is funner than Bjorn.
Gregory is the most fun man I ever met.
Gregory is the funnest man I ever met.
If you’re not sure which way to go, remember that
more fun and
most fun will raise fewer eyebrows than
funnerand
funnest.”
So...I stand by my usage. But God forbid (go ahead and challenge starting a sentence with “but” too) that this might be the first time you offer any concession. I await patiently for your wall of text that ignores the above because of your need to be always right.
You purist you.