うまぴょい
[tn]Umapyoi, "horseyhop!"[/tn]

[expand=Fan definition]
[tn]Sourced from an old (currently-defunct) Pixiv Encyclopedia article.[/tn]
Umapyoi /ɯmapʲoi/
1. Abbreviation of "Umapyoi Densetsu", one of the songs for the Umamusume franchise.
2. To dance or sing along with the Umapyoi Densetsu song.
3. [analogy from 1.] To fully finish a given Umamusume's training scenario (winning the URA finals with first place) in the Umamusume Pretty Derby game.
4. [analogy from 3.][euphemism] To "go all the way" with a given Umamusume. To achieve last (fourth) base. [/expand]

Slang coined by the [[Umamusume]] fanbase, deriving from the title and song lyrics of the [[Umapyoi Densetsu]] song. Generally used in the sense of: 1. To finish a given [i]umamusume[/i] [[horse girl]]'s training scenario in the [[Umamusume]] game; 2. To get along very well or "buddy buddy" with a given [i]umamusume[/i] (or [[Kiryuuin Aoi]]); or 3. To "go all the way" or do all sorts of implied hanky panky things with a given [i]umamusume[/i] (or again, [[Kiryuuin Aoi]]). 

Effectively used as a euphemism in most fan comics, especially in 'comedic' scenarios, where it usually involves an [i]umamusume[/i] going [[yandere]] on [[Trainer (umamusume)|the Trainer]] and alleging the latter [i]umapyoi[/i]-ing the other girls. Occasionally it is [[Happy Meek (Umamusume)|]] accusing [[Kiryuuin Aoi]] (of going out with the [[Trainer (umamusume)|the Trainer]]), as a reference to one of the in-game events.

A common variation used by fans (but not in official media) is "onsen umapyoi", occasionally abbreviated to "onsenpyoi" (温泉ぴょい). This can refer to either: 1. to finish a given [i]umamusume[/i] [[horse girl]]'s training scenario with the semi-secret hot spring event unlocked, which requires the player to randomly acquire the Hot Spring Tickets in that scenario and win the URA final, or 2. from the above, to "go all the way" at the hot spring [i]ryokan[/i] with a given [i]umamusume[/i] (or, yet again, [[Kiryuuin Aoi]]). 

Since the release of the Aoharu training mode, [[Kashimoto Riko]] has joined [[Kiryuuin Aoi]] in the list of possible umapyoi-ees (or, alternatively, umapyoi-ers).

The song also features other 'nonsensical' portmanteau words such as [i]umadacchi[/i], [i]sukidacchi[/i] and [i]umapoi[/i] (without the 'y'), all of which are also co-opted by the fanbase for pretty much the same meanings as [i]umapyoi[/i] above. As such, these examples can also be tagged umapyoi.

Usage of all these four words has also spread to other fanbases.

This tag should generally not be used when the words occur as part of the [[Umapyoi Densetsu]] song, i.e. the characters are singing the song normally in their original context.

h6. How the words are spelled (for ID-ing)
[expand]
* うまぴょい [tn]umapyoi, "horseyhop!"[/tn]
* うまだっち [tn]umadacchi, "horseypals!" or "horsey-stand-up!"[/tn]
* すきだっち [tn]sukidacchi, "likeypals!"[/tn]
* うまぽい [tn]umapoi, "horseytoss!"[/tn]
* 우마뾰이 [tn]"umapyoi" in Korean[/tn]
[/expand]

h6. Original song lyrics, first verse
[expand]
[tn]JP:[/tn]
うーーーー(うまだっち)
うーーー(うまぴょい うまぴょい)
うーー(すきだっち) うーー(うまぽい)
うまうまうみゃうみゃ 3 2 1 Fight！！

[tn]Transliteration:[/tn]
Uuuuuuuuu (Umadacchi!)
Uuuuuuu (Umapyoi Umapyoi!)
Uuuuu (Sukidacchi!) Uuuuu (Umapoi!)
Uma uma umya umya 3 2 1 Fight!!
[/expand]

h4. See also
* [[Umapyoi Densetsu]]
うまぴょい(動詞) うまぴょい こいつらうまぴょいしたんだ!!