Looking on the internet deeply has found these results:

hashtag is fun is the most popular phrase on the web.

hastag is for fun 10 results on the web	hashtag is fun 110 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Apr 2, 2014 ... Re: #GoGaints Our fun new hashtag is fun. Remember, though. A lot of Dodgers fans actually really think it's spelled #Dogers. — Walton ... Sep 3, 2013 ... ... but using generic hashtags that are used by people all over the internet won't help (An example of a generic hashtag is “#fun” or “#funtimes”). Jan 16, 2015 ... ... and appear spammy. Use a few hashtags relevant to your tweet and/or niche, and occasional use of a funny/made up hashtag is fun too. Aug 25, 2011 ... ... occassionally debating tool – the ABCs Q&A hashtag is fun to follow and join in , as was the Australian Federal election discussion last year.

hastag is for fun

10 results on the web

hashtag is fun

110 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Apr 2, 2014 ... Re: #GoGaints Our fun new hashtag is fun. Remember, though. A lot of Dodgers fans actually really think it's spelled #Dogers. — Walton ...
Sep 3, 2013 ... ... but using generic hashtags that are used by people all over the internet won't help (An example of a generic hashtag is “#fun” or “#funtimes”).
Jan 16, 2015 ... ... and appear spammy. Use a few hashtags relevant to your tweet and/or niche, and occasional use of a funny/made
up hashtag is fun too.
Aug 25, 2011 ... ... occassionally debating tool – the ABCs Q&A hashtag is fun to follow and join in , as was the Australian Federal election discussion last year.