"Deadpanning" refers to delivering a joke or statement in a deliberately expressionless manner. Some possible antonyms for "deadpanning" could include: emoting, emotive, expressive, animated, lively, ebullient, effervescent, exuberant, exaggerated, flamboyant, theatrical, or melodramatic. These words suggest a more dramatic or lively style of delivery, which would be the opposite of deadpanning. Alternatively, antonyms could emphasize a more serious or intellectual style of delivery, such as: thoughtful, contemplative, reflective, insightful, cerebral, academic, erudite, or pedantic. Ultimately, the specific antonyms for "deadpanning" will depend on the desired tone, context, and mood of the communication.