why don't Americans like to use the word "dashing"?

Some people might never have heard the word. Some might not understand it's context.  If you believe that Americans - generally - don't use it then it's Americans whom you should ask about this.  It might just not be in their vocabulary or have a completely different meaning to them and is not one that they choose to use.

You will find out ONLY by asking them.

Well if they don't they are missing out on one of our most popular Christmas songs ever hey:

JINGLE BELLS!  🎿🎅👼🤶🧑‍🎄🎄

"Dashing through the snow

In a one horse open sleigh

All the fields we go

Laughing all the way"  ☃️. 

Ps. Sorry "The Football God."   Just noticed your answer was about the same thing as mine.  Great minds think alike lol.  🖖🙂👍

Dashing through the Snow is American

Dashing as in Me is British

Dashing around we all do that at Times

isnt dashing for a bus and he looks dashing in hes suit the same !!! americans use running for the bus or doesnt he look suffisticaled . as an american what the difference between a truck and a lorry ??

It's not that Americans "don't like" to use the word. They simply don't use it.

Same as we don't say "multiple times" but "several times".

To those who aren't sure, "dashing" is an adjective - a little old-fashioned these days but NOT "snobbish"  - meaning something like a combination of elegance and daring.

The elite is faking that they took the real vaccine; the real vaccine will cause spiritual and physical damage. When will the official churches start praying for the false prophet? Orthodox Christian three hand signs are different than Buddhist mudras. Ecumenism = 263 heresies; each heresy leads to hell. Orthodoxy = the only true faith; Roman Catholics tried one cup - one spoon ritual and got sick with Bubonic plague; if heresy enters Orthodox monastery then monks/nuns will get sick with flu/tuberculosis (for instance); Orthodox churches who closed for COVID or had disposable cups/spoons or dipped spoon into alcohol are no longer brides of Christ (now they serve Satan and honor Satan's new COVID religion). Don’t go into UFO to be “healed” by evil demons; demons never do good. SSN is written as a barcode/QRcode; then it's put into a chip; chip is put into vaccine; chipped people are influenced (by super computers) to receive grey plastic card World Passport with no name on it (but when they stretch their hands to get it, gov't clerk presses secret button to administer the unforgivable green 666 tattoo by isotope rays). If you reject mark of the beast (by hiding within a 10-15 people group according to saints Gabriel Urgebadze and Seraphim of Sarov), then your direct ancestors go to heaven (according to saint Vyacheslav Krasheninnikov from Ural). First vaccine shuts off your immune system; second vaccine gives you diseases; third vaccine puts your immune system back and it will start fighting the diseases and will cause death. Saint Paisios from Mount Athos said that the devil wants to deceive the rich with freemasonry, poor with communism, and believers with ecumenism. Elpidios Vagianakis said that there will be seven “mark of the beast” vaccines; reject all of them! Documents are from Satan; burn all the documents that you can find. Electronics will be used to track you. Even old broken unplugged 1970 TV set will show the evil flying antichrist using Tesla's ether. Don’t go into UFO to be “healed” by evil demons; demons never do good; always pray the Jesus prayer or to saints who help right away (like saint Vyacheslav Krasheninnikov according to whom if you reject mark of the beast, then your direct ancestors go to heaven); forgive me.

That's what I do in my one horse open sleigh.

No it ain't. Brits stopped using it in the 50s.

It reeks of upper class speech. And one think Americans don't like is rich snobishness 

For the same reason that Brit's don't like to say "lousy."  i.e., local dialect preferences.