Runty Edit Meaning

1.

Using agression to gain respect and/or fear from one's peers; a defense mechanism employed due to insecurity.

It's the same principle by which the runt of a litter of pups will sometimes become a biter because they don't know a better way to secure their food and/or place in the pack.

She's being a runty bitchtoday. She thinks that makes her a thug, but it don't.

2.

spunky, feisty, wriggly. Aka runticular.

As runty as a retriever.