Makoto tachibanas nickname from the first trailer of the anime Free! this was used since people didn't know Makotos name at the time the first trailer was released .
Guy 1 : Hey have you seen of the new episode from Free!It is about water bottle senpai.
Guy 2: Yes I have it is so exiting !
Guy 2: Yes I have it is so exiting !
by Kouji itsuki April 20, 2019
Get the Water bottle senpai mug.