Cheersing vs cheering [closed]
Solution 1:
It's certainly not a word that I have come across, and I believe that it is not a real word.
That said, I have once heard someone say "we were cheers'ing all night in celebration".
That is, the pseudo-word "cheersing" describes the act of saying "Cheers!".
In addition, it's use is not prevalent in literature according to Google Ngram.
Solution 2:
Looking in Google books, "cheersing" does not mean the same as "cheering". It's the act of raising a glass (or clinking a glass with somebody else) and saying "cheers".
In at least two of the roughly ten books you can see it in, someone uses it and somebody else says that it's not a real word. I would agree.
It also seems to be found in the past tense—"cheersed"—but not in the present.
Solution 3:
The usual word in English for "cheersing" is "toasting". Instead of, "we cheersed him", one would normally say "we toasted him".
The usage is uncommon and appears to be a slang neologism or perhaps a nonce coinage by those unfamiliar with the word "toasting" in this sense.