Jim Belushi — Weed SNAFU in Martha’s Vineyard

Jim Belushi just learned a valuable lesson.
Jim Belushi
just learned a valuable lesson — don”t fly into Martha”s Vineyard with a fat ass joint in your pocket … unless you wanna lose it.

Sources tell our sources, Jim was at the uppity Martha”s Vineyard airport on Friday — when TSA agents discovered a marijuana cigarette on the actor”s person.

We”re told Jim tried to justify his pot by brandishing his California medical marijuana card — but he quickly learned … medical marijuana cards don”t mean jack in Massachusetts.

We”re told the West Tisbury Police were notified … but since the amount was so small — and marijuana possession has been decriminalized in Massachusetts — cops just confiscated the drug and let Jim off with a warning.

Total buzz kill. Calls to Jim”s camp were not returned.