Acts like a wet blanket is a phrase used to describe someone or something that dampens the mood, enthusiasm or excitement of others. To counteract such negativity, it is helpful to know the antonyms or opposites of this phrase. An individual who acts like a ray of sunshine, a breath of fresh air or a burst of energy can uplift or motivate those around them. Similarly, an event that is described as invigorating, inspiring, or thrilling can create a buoyant atmosphere. Thus, alternative expressions such as 'fires up', 'adds spark' or 'spurs on' can be used to steer clear of the dull and unexciting vibe of wet blankets.