The fiery twinge felt at the back of one's throat after having succombed to the inevitable desire to continue chugging delicious Coca-Cola once the first glorious gulp has hit the taste buds. The delightful burn felt from enjoying a fine cola in quantities larger than one sip, usually as a result of the impulse to continue drinking rather than break for air once the savory nectar has entered the mouth.
"Dude--you alright? Did you swallow something wrong?" "No, dude. Just a case of the cokeburn."