interjection. An onomatopoeic representation of laughter.

noun. Type of boundary to a garden, pleasure-ground, or park, designed not to interrupt the view and to be invisible until closely approached.

"And he's done in an extremely Ovechkin style, with multiple hat-tricks worth of the phrase "haha," enthusiastic misspellings like announcing he was "in Maimi" or pledging to "bay some staff," and rapid-fire deployments of exclamation marks."