To Have a sip of milk after taking a shot of hard alcohol. For example with bourbon, ...sounds weird but tastes great. The milk soothes the burn of bourbon, while the bourbon brings out the sweetness of the milk. Almost tastes like caramel.
Person 1: Eww I don't want to chase my bourbon with milk.
Person 2: Stop being a pussy, it's not like you could get that shot down any other way! Go on take a milk chaser.
Person 1: OK, I guess...heard it might taste like caramel.