Tay-stee whel-kum noun-
1. A delicious frosty drink, left in the car on a hot day, so after a quick dash into a store, business, errand etc. it is placed strategically for a quick sip on arrival back into said vehicle.
2. Anything that is wonderful, and brings happiness at the perfect place and time.
1. That iced mocha coffee will be a tasty welcome after I get back.
2.That song was a tasty welcome. I just love harmonica music.