J-brake
You do a raspberry on your partner's eye or butt, then suck in like you're trying to eat a fart from a broken 18-wheeler.
I did a J-brake on my sister and she said I was the worst sibling ever.
He did a J-brake on his girlfriend and she got a stomachache.
At the party, my friend did a J-brake on me and I got food all over my face.