Kourtney Kardashian poured her little heart out -- into shot glasses -- during a random pit stop in Massachusetts.
Kourtney turned up Wednesday night at local dive bar The Chicken Box on Nantucket Island, and took matters into her own hands ... pouring Don Julio shots!
She did plenty of damage in her half hour visit ... jumping onstage with funk band The Soul Rebels and shooting a little pool.
MILFs still get down.
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