jack in the slat
when you bone your girlfriend so hard you dump your whole load on her privates. it's like you're giving her a slat facial and telling her you're not done yet.
i jacked my girlfriend in the slat and now she won't stop teasing me about it.
he said he'd jack her in the slat if she promised to be his girlfriend forever.
my girlfriend told me she'd let me jack her in the slat if i gave her a sandwich.