Ruined orgasms are orgasms that are purposely halted as part of tease and denial play. In a ruined orgasm, the person typically still has an orgasm - but stimulation is ceased right at the point of no return, so the orgasm feels extremely lackluster. They may also be prevented from orgasming at all. This type of play is typically a part of BDSM scenes where the submissive is denied the orgasm as a form of power play. This differs from edging where the goal is to reduce stimulation multiple times in an effort to produce a more powerful orgasm.
Ruined orgasms can also occur unintentionally when a person becomes distracted or distrupted prior to climax - even during masturbation.
Ruined orgasms can be a fetish for those who fall on either side of the sexual control coin. Dominants might enjoy controlling when, whether, and how a submissive gets to orgasm, while submissives tend to enjoy ceding that control to their dominant. Most depictions of ruined orgasms in pornography are in female domination/male submission situations - femdom - but any relationship configuration can enjoy this play.
Ruined orgasm is a common theme in pornography. Typically, this type of pornography depicts a penis-owner being denied pleasure by their female-presenting partner. The focus in these scenes tends to be on the dominant's control over their partner as well as the controlled person's intense desire for pleasure.
For those who ejaculate, a ruined orgasm can still result in ejaculation but with lesser feelings of orgasmic ecstasy. Depending on the intensity of the ruined orgasm, intense feelings of frustration and pent-up energy can occur - even if the ruined orgasm was desired only moment's ago.
Since much of the pleasure of ruined orgasms is psychological, the feelings in the body can be secondary.