Maybe this isn’t such a GOOD day for 2 Chainz after all! the rapper was arrested earlier today in NYC! Find out the details below.

Marisa Mendez

2 Chainz — real name Tauheed Epps (who also goes by the name Tity Boi) — was entering the Delta terminal to fly to a show in North Carolina … when the TSA discovered brass knuckles in his bag.

Law enforcement tells TMZ … police were called to the scene … and 2 Chainz was taken into custody for misdemeanor possession of a criminal weapon at 1:45 local time.

2 Chainz — famous for his hit song “Spend It” — is still in police custody.

A rep for 2 Chainz tells us … his team is “handling the situation.”