Merriam-Webster define glossolalia as

ecstatic, typically unintelligible utterance occurring especially in a moment of religious excitation —usually plural

Glossolalia.

I imagine this instability results from signifyin as being a living rhetorical mode, something that is constantly evolving as it is practiced; I think it also suggests how oral and everyday it is--signifyin' and its different forms are in practice in everyday conversations among African Americans. It's difficult to capture something so oral and performative in something as rigid as definitions.

The act of stabbing someone, with the intent to kill them.

People who present themselves in a grandiose manner, but are seen as vain fools who lack true knowledge or valid achievements; fops.

To move in a swift manner or to scamper about.