1.) Describing a bowl movement as it happens.
2.) Giving full details while on the toilet
Person 1, "Oh! This toilet seat is very cold and I'm starting to prairie-dog"
Person 2, "Wow, I don't need the Play-by-play!"
When you say that you dont need a 'play by play' it means you dont need the full details.
"Hey. I only asked how the party went to be polite, i dont need a friggin play by play of the evening!"
When you broadcast your every move throughout the day to people who probably don't care on s.n.s's such as facebook and twitter.
9:01 a.m - Just woke up, I'm hung over.
9:04 a.m - Finally out of bed, should I take a piss or should I drink some Advil and take a piss after wards so the extra liquid can piss out.
9:04 a.m - Well I decided to take some Advil first, here it goes!
9:05 a.m - It looks like it's going to rain outside
You get the point... Play by play