Potheads who’ve found the grass is greener under the state’s mellowed-out marijuana law have racked up as much as $64,500 in unpaid fines in Boston alone, thumbing their noses at hundreds of citations that cops have written up, but authorities are powerless to enforce.

Now the City Council wants to smoke out the stoner scofflaws.

“Everybody’s laughing in the face of this thing. We need to find a way to tighten up the loopholes that are allowing precious dollars to escape,” said Councilor Stephen J. Murphy, chairman of the committee on public safety.