Mix cookie crumbs with melted butter and press firmly into the bottom of a 9-inch pie pan.
In a large bowl, combine shredded coconut with sweetened condensed milk until well mixed, then spread evenly over the crust.
Refrigerate the pie for at least 2 hours until the coconut layer is firm.
Melt chocolate chips in the microwave in 30-second intervals, stirring between each, then pour over the chilled coconut layer and spread to cover completely.
Return to the refrigerator for another hour until chocolate is set, then slice and serve chilled.