The common act of purchasing a puppy as a symbolic replacement for a child between a couple in a relationship. Most commonly occurs before marriage when a couple in a relationship seek further means to bind them together without going as far as having a child together.
"I can't believe they want to get a pet together after only dating for half a year", said Jessica.
"Haven't you heard? Puppyism is the best form of birth control. Instead of having a child, they'll just have a dog", replied Nick.
To follow around, or "suck someones cock" all day.
Dude Jake was following Diana around all day at school. Yeah I heard Jake loves her and is making her feel bad to back out with her. Dude thats puppyism.