Kibosh

[Lanell]

to stop something from [happening]; to [restrain]

to [put] the kibosh on something

[Renato]

Decisively end or reject (something)

[Britney]

To suddenly bring [an end] to a positive [performance] or [hot streak] with a single extremely terrible or series of awful performances, plays, or shots.

[Sonia]

To [end] a [relationship] that is [not really] a relationship

[Donald Trump]

a [threesome] involving 2 men and one woman where both men [hump] the chick at one point or another during [the ordeal].

[Lizzy Liz]

to spoil or destroy an idea or plan: