You'll often find the adjective tumescent describing body parts swelling with sexual excitement, but it can be used for anything that's distended or enlarged. Ripe fruit, puffy hairdos, bloated bellies — all of these are tumescent. Things can be figuratively tumescent too, like an actor's tumescent ego, or overblown, florid, tumescent writing: "I couldn't help giggling when she read her tumescent poetry aloud." The Latin root is tumere, "to swell."