Informal:
* Mo n gbè rè o: This translates literally to "I'm carrying you" and implies you are joking.
* Mo n tà àrò o: This translates to "I'm just teasing" and is similar to saying "I'm just messing with you."
* Mo n gbégbé è o: This translates to "I'm just playing" and can be used in situations where you're being silly or playful.
* Mo n gbé è o: This translates to "I'm just kidding" and is a more direct way to say it.
Formal:
* Mo n rè́ è o: This translates to "I'm just joking" and is a more formal way to say it.
* Mi o sé o: This translates to "I didn't mean it" and can be used if someone took your joke seriously.
Adding "Mo fi gbogbo okan rè wè mi" (I am joking with all my heart) to any of the above phrases will emphasize that you are indeed joking.
It's important to choose the right phrase based on your relationship with the person you're talking to and the context of the conversation.