intense swimmer
An adjective used to describe when a person is much too focused and/or enthusiastic about an activity.
Jake: (starts running in front of everyone on a jog.)
John: Dude, Jake, you're going all intense swimmer on me.
Jessica: Yeah, just chill in the hot tub.
John: Dude, Jake, you're going all intense swimmer on me.
Jessica: Yeah, just chill in the hot tub.