Jizzing on the cake

1.Ruining something new;spoiling someone's fun

2.Making something good look bad

Part of speech: verb

Other forms:to jizz on the cake,jizzed on the cake

Possessive: jizzing on my/her/his/their cake

Pete:"check out my sweet new ride"
John:"ehh it has some little scratch marks over here"
Pete:"ok so its used"
John" and these rims arent that nice"
Pete:"Stop jizzing on the cake!!!"