street credibility vs street cred

street credibility and street cred both are nouns.

Word	Noun	Adjective	Verb	Adverb
street credibility	Yes	No	No	No
street cred	Yes	No	No	No

As nouns, street credibility and street cred are synonyms defined as:

street credibility and street cred: credibility among young fashionable urban individuals

Other synonyms of street credibility include cred.

street credibility (noun)	street cred (noun)
credibility among young fashionable urban individuals	credibility among young fashionable urban individuals