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to completely bonk your girlfriend and then dump your whole load right on her privates. it’s like you’re saying ‘i’m not done yet’ and you’re basically giving her a free slat massage.
he jacked her in the slat so hard she cried and then laughed because it was so funny.
i told my mom i was going to jack her in the slat and she said ‘you better not come home with a broken nose.’
my girlfriend said she’d let me jack her in the slat if i promised to never mention it again.