When you're fuckin a girl, you pull out your dick almost all the way - SLOWLY - teasing her and making her thirsty for you to bring it back, you pause for a second, gather your strength, and ram it back in with the force of a freight train, clenching your fists and scrunching your face.
A common username that insecure people use and would be embarrassed if anyone not in a friend group (For example, a friend's dad) would say the username