Haha yeah man
You say this when you’re either lost in a conversation or you’re trying to make someone else look like a lost dog in a thunderstorm. It’s like throwing a grenade into a group chat and hoping nobody notices.
"Haha yeah man," I said, because I had no idea what the question was about.
"Haha yeah man," I said, and then I left the conversation and went to sleep.
"Haha yeah man," I said, and my friend stared at me like I had two heads and a bad haircut.