The act of fooling yourself into thinking you've had a great time at port whithout actually leaving the ship.
Step 1 : At at the fantail of the ship, toss $100.00 overboard.
Step 2 : Drag your dick across non-skid deck.
Step 3 : Bang your head against bulkhead until you pass out.
Step 4 : Wake up out of $100.00, sore dick, terrible headache, and you'll think you had a blast on liberty!