Meaning of “FanSa(ファンサ)”

“FanSa(ファンサ)” is an abstraction for “Fan Service(ファンサービス)”.
Since many people are doing Oshikatsu(押し活), we often hear this slang as well.

Example Conversation

A: My oshi’s FanSa(ファンサ) is super great!
B: Envy you, my oshi(推し) is basically ShioTaiou(塩対応), but I love him, even more because of that.

A: 私の推しはファンサヤバい！
B: いいなぁ、私の推しは基本塩対応だからなぁ。でもそういうところも含めて好き！