Ghostface Killah Mouthy Fan Steps Up To Get Beat Down

2/5/2015 12:30 AM PST

Ghostface Killah -- Mouthy Fan Steps Up to Get Beat Down (VIDEO)

EXCLUSIVE

Ooh wee, a Ghostface Killah fan just got a painful lesson -- if you mess with the man with the mic in his hand, or the people who paid to come see him ... you might catch an ass-whupping.  

A show organizer explains ... GK got into it with a fan who was flipping him off and cussing at him during the gig at a tattoo convention in Amarillo, TX last weekend. From the stage, Ghost threatened to pound the guy out, but the fans handled that for him. 

After a few exchanges, the crowd jumped the guy and started unloading ... until security dragged him out, and Ghostface got back to business. 

Law enforcement sources tell TMZ ... cops questioned the mouthy fan, but no charges were filed.