If something was spicy or pungent, that meant it had a strong smell or taste that also produced a burning sensation in one's mouth. According to a commercial, Tribbles cereal was available in a Spicy Ranch flavor. (ST: "The Trouble with Edward")
Hasperat was spicy. (DS9: "A Simple Investigation"; VOY: "Someone to Watch Over Me")
Neelix once fed Tuvok some plomeek soup that he had changed the recipe of to make more spicy. He dubbed this creation Plomeek Soup a la Neelix. (VOY: "Faces")
Excessive spiciness could cause acute functional dyspepsia in Humans. (VOY: "Message in a Bottle")
Tuvix once cooked Kes some crêpes, but made them less spicy than Neelix's recipe so that she could taste the mushrooms better. (VOY: "Tuvix")