Preston Lacy -- the guy who farted into the fart mask in "Jackass 3D" -- was arrested earlier this month after cops discovered something else with potent fumes ... marijuana.
TMZ has learned ... Lacy was busted in Oklahoma on December 14 -- after cops say Lacy was in possession of a controlled substance (weed) and drug paraphernalia (rolling papers).
Lacy was charged with two misdemeanors -- and if convicted, he could spend up to two years in prison and face $2,000 in fines.
Attempts to reach Preston were unsuccessful.
Farting Guy in 'Jackass' -- Busted for Weed
1/1/2011 5:40 AM PST BY TMZ STAFF
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