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(TMZ) - Rapper Juvenile was arrested for disorderly conduct at a Miami hotel last night after allegedly participating in a crazy brawl... TMZ has learned.

Juvenile - real name Terius Gray - had just reunited with Lil Wayne on stage at LIV nightclub earlier in the evening... when something went wrong.

Juve and Wayne - who were in the Hot Boys together back in the late '90s -  had a long running beef when the group broke up... and last night was the first time they have been on stage together since the feud.

But around 7AM, cops say Juvenile - who's listed at 5'11, 150 lbs - was involved in a fight that began inside the nightclub and spilled outside to the front of the hotel.

Security told police the people involved in the fight were "creating a threat to life and property as well as the overall safety of the patrons inside."

Miami Beach PD responded to the scene and arrested Juve - he was hauled to a nearby station where he was booked. He is still in custody. 

READ MORE: TMZ