Poorly trained or untrained grappling.
Often taught by an instructor inexperienced in grappling as an attempt to cash in on a fashion, by a McDojo, or due to criticism of a lack of grappling training, an example of bullshido.
They teach crappling there.
You don't know how to grapple you can only crapple
When someone is beginning to learn a grappling martial art such as Brazilian Jiu Jitsu but cant yet be classed as being able to properly grapple.
You're not grappling man, you're still crappling.