or ha ha ha
1.
Ha ha is used in writing to represent the sound that people make when they laugh.
I dropped my bag at the officer’s feet. The bank notes fell out. ‘Ha ha ha!’ he laughed. ‘Got no money, uh?’
EXCLAM
2.
People sometimes say ‘ ha ha ’ to show that they are not amused by what you have said, or do not believe it. ( SPOKEN )
He said ‘vegetarians unite’, and I looked at him and said ‘yeah, ha ha’.
EXCLAM