happy ending
US /ˈhæp.i ˈen.dɪŋ/
UK /ˈhæp.i ˈen.dɪŋ/

1.
a conclusion to a story, film, or play in which the characters are happy and problems are solved
:
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Everyone loves a movie with a happy ending.
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Despite the challenges, the story had a surprisingly happy ending.
2.
a sexual act, typically involving manual stimulation of the penis, performed at the end of a massage
:
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The client was arrested for soliciting a happy ending at the massage parlor.
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Some illicit massage parlors offer a 'happy ending' as an additional service.