spoilsport
nounmasculine/femininecoloquial/dɨʒ.ˈmɐ̃.ʃɐ pɾɐ.ˈze.ɾɨʃ/medium
des·man·cha-·pra·ze·res
Definition
A person who spoils the enjoyment or pleasure of others.
Don't be such a spoilsport, come and join the game!
He's a real spoilsport, always complaining about the music.
Etymology
Composto do verbo 'desmanchar' (estragar, desfazer) + 'prazeres' (prazeres).