In jest
Definition 1 of 1
Pro Tip 1/3Cultural Sensitivity
In some cultures, remarks 'in jest' may be misunderstood. Consider cultural context before using humor. 
Her joke was in jest, but the cultural difference made it confusing.
Pro Tip 2/3Not Literal
Understand that what is said 'in jest' should not be taken literally, it's meant humorously. 
He claimed to be a superhero, but it was all in jest.
Pro Tip 3/3Tone of Voice
Pay attention to tone and facial expressions, as these often indicate a comment is in jest. 
With a wink, she said in jest that she could eat a horse.