Meaning of “riatai”(リアタイ)

It means “in real time” or “live”.
“riatai” is an abbreviation of “realtime”(リアルタイム).
Yes, Japanese always want to make words 4 characters.

Example Conversation

A: You can watch the game on NHK tonight.
B: Really? Oh, I’ll watch it and do riatai tweet.

A: その試合は今晩NHKでやるよ
B: まじで? あー、見ながらリアタイツイートしようっと。

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