Best definition
Weather Fivecast
(noun). Exactly the same as a weather forecast except it was hella accurate.

“Enter two homies at the beach, Lorenzo and Jarome when, suddenly, it starts raining”

Lorenzo: “what tha hell Jarome you said it was ’gon be sunny all day! I ain’t never ‘gon listen to you or ya dumbass cousin ‘bout tha weather ‘gain.”

Jarome: “Yo fam, this shit wild! Imma have to go whoop Tadpole’s ass! Dat nugget swore he was givin’ me a weather fivecast.”
Weather Fivecast: define #2
Weather Fivecast
(noun). Exactly the same as a weather forecast except it was hella accurate.
“Enter two homies at the beach, Lorenzo and Jarome when, suddenly, it starts raining”

Lorenzo: “what tha hell Jarome you said it was ’gon be sunny all day! I ain’t never ‘gon listen to you or ya dumbass cousin ‘bout tha weather ‘gain.”

Jarome: “Yo fam, this shit wild! Imma have to go whoop Tadpole’s ass! Dat nugget swore he was givin’ me a weather fivecast.”