hahe
It's the same as heha. Just a lazy way to say you're laughing, but you're too lazy to type it right.
Bro, I saw that meme and just typed hahe. I'm too tired to do it properly.
My dog fell off the couch. I typed hahe because I was too lazy to type haha.
My teacher said 'hahe' in class. Everyone laughed because it was so wrong.