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Grade Inflation: As in Ouendan and EBA, S comes after A, but a perfect performance in osu! earns the player an SS rank. Game Within a Game: Taiko, Catch The Beat, and osu!mania modes. Also some, teams that don't exist anymore, like MAT (Modding Assistance Team), BAT (Beatmap Appreciation Team). Fun with Acronyms: GMT (Global Moderator Team), QAT (Quality Assurance Team). So to get high-ranking scores you have to alter the song. Playing for score? Aside from the combo multipliers practically encouraging restarting over one mistake (a game design element shared with osu!'s source game), modifiers add to your score, most notoriously the modifier that increases the song's speed by 50% to give a 12% score boost. Or have FAKE SPINNERS in the storyboard. There was a time when maps could be impossible to S-rank, even by Auto. In addition, some very specific mapping techniques are not allowed to be ranked due to being very confusing and frustrating for players. Using solely tricks like low (or high) Approach Rate, high HP drain, etc., are no longer acceptable in the Ranked Beatmaps section. On mapping side, it's HEAVILY discouraged nowadays, and maps with it have a very low chance of being ranked. If they lose a rank in the top 50, don't expect them to quit playing for hours until they beat the player who beat their score. Determinator: A player can become this if they're trying to pass, get an FC (Full Combo), or enter the Top 50 on a beatmap, especially if the beatmap is pretty difficult. Crossover: The beatmap for Queen's Don't Stop Me Now is based on the plot of a Fan Fic which combines Phoenix Wright with Elite Beat Agents. Call a Hit Point a "Smeerp": The currency of this game is called "kudosu", and is earned through modding unranked maps. osu!core became a permanent available mod called Nightcore, and Touhosu! has been confirmed as in development by peppy. Also, some of those jokes have ascended.
April Fools' Day: The jokes each year revolve around changes in the game's genre ("Touhosu", a Touhou Project/osu! hybrid), gameplay ("osu!core", where the songs in every beatmap had their pitch and speed increased), staff (unexpected demotions or promotions), and beatmaps (pretending to approve and praise an extremely poorly made beatmap).Anime Theme Songs: Around 1/3 of all the ranked maps are these.all lowercase letters: The game is called osu!, not Osu! nor OSU!.Its website can be found here, osu!stable can be downloaded here, and osu!lazer can be found and downloaded here.