Aquaman's sleepin' with the fishes, for real for squealin’
from MF Doom – Batty Boyz Lyrics on Rap Genius
Meaning

“Sleeping with the fishes” is an old gangster term meaning they killed somebody and dumped the body in water as to not be found. DOOM is saying Aquaman “squealed” (snitched), so he’s sleeping with the fishes for real now.
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