You point 'em out, and call 'em up, and then s-sit 'em down
Then you put fertilizer, lyin, spread the shit around

from Wale (Ft. Bun B) – Mirrors Lyrics on Rap Genius

Meaning

Once you figure out who’s fake, you single them out and make sure they know that what they’re doing isn’t cool.

Haters are spreading rumors (shit) around similar to fertilizer is spread on a farm or garden.
Most fertilizer is made of fecal matter = shit

To help improve the meaning of these lyrics, visit “Mirrors” by Wale (Ft. Bun B) Lyrics and leave a comment on the lyrics box