Lil Wayne is lying through his diamond-encrusted teeth ... claiming he didn't INTENTIONALLY step on the American flag during a video shoot ... despite the fact he can be seen looking down on Old Glory several times during the performance.
Wayne just tweeted about his controversial video shoot for "God Bless Amerika" in New Orleans ... saying, "I didn't step on the flag on purpose! It's a scene in a video where the flag drops behind me and after it drop it's just there as I perform."
Translation -- I swear it was an accident ... please don't hate me.
So ... you buyin' Weezy's explanation?