To quote a notable Rav in Ramat Bet Shemesh, a tsioni is a Jew who loves Erets Yisrael. We all aim to love EY, and chas vshalom would never want to fall into cheit hameraglim and say negative things.
In addition to the above, some culturally use this term to refer to one’s stance vis a vis the medinah. But let’s make no mistake. We are all, as frum Jews, zionists in the pre Herzl state of the word.