Pet rock 

1. A fad from the mid 70's which was just a rock in a box.
2. The type of music Flipper announced that they played.

1. Did you hear James bought a pet rock? What a dumbass, that trend's been dead since 1976!
2. "Announcing that they were playing a new form of music called 'PET rock' ('not a joke, and if it were, it wouldn't be funny')..." - Some websites regarding Flipper.

Pet rock by hcpunkfan703 August 16, 2018

Pet Rock 

A girl who doesn’t show her emotions or is scared to be vulnerable to a boy.

That Sam is such a pet rock, i keep trying but she’s scared to be vulnerble

Pet Rock by The director Dan February 25, 2019

pet rock video 

A video upload which contains no useful information, political, technical,
scientific or otherwise important new product caveat updates.
An absolutely boring video.
A video which contains near exact themes in relation to innumerable others.

I saw another pet rock video today of a cute chick on her second day of
distilled water fasting.

pet rock video by 10isC November 21, 2017

The Next Pet Rock 

quick claim to fame; the next new trend; the next bonanza; your 15 minutes of fame, if you're pedestrian.

She's always thinking of ways to come up with the next pet rock.

The Next Pet Rock by postmenopausal September 19, 2015

Billy’s Pet Rock 

David

Billy’s pet rocks name is David.

Billy’s Pet Rock by AverageBreadEnjoyer April 11, 2023

Pet rocks 

pet rocks are great for your lifestyle and will keep you company right until you well..um..die.

do you like my pet rocks? this is sarah, jim, and bob.

Pet rocks by #1vscogirl September 8, 2019