So you niggas need to stop testing me
Because you know you can't "F" with me
Stepping to me with insuperior weaponry

from Common (Ft. Canibus) – Making a Name for Ourselves Lyrics on Rap Genius

Meaning

Canibus is the best MC alive (in his head), so everyone should just back off because there’s no way they can outgun him. Also, is he daring rappers to fail him on a test?

Also, Canibus might not be familiar with the word ‘inferior’

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