Former NFL offensive lineman Gosder Cherilus -- the 17th overall pick in the 2008 NFL Draft -- was arrested over the weekend ... after he was accused of peeing on a passenger while aboard an airplane.
Massachusetts State Police say the incident occurred on Sunday morning ... while the former footballer was on a Delta flight bound from Boston to Ireland.
Cops say Cherilus was "unruly" while on the plane -- and when officers arrived at Logan Airport at around 2 AM and demanded he get off the plane after it landed, they say he "became irate and uncooperative.