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Spare Tire, Beer Gut or Muffin Top grown specifically to save your partner from trauma during intercourse. Can be ambi-sextrous.
Dude 1: "Bro? That's quite the belly you're getting on you."

Dude 2: "Aww this? That's my fuck bumper. The wife was complaining of pain in her spleen. I figured I better add some cushion to my pushin'"

Girl 1: Hey girl? Are those new Jeggings?
Girl 2: I've had these jeans for 5 years! But I have to tell you.. My spleen's been hurtin' so much that I had to grow out my Fuck Bumper a bit. My new guy has a real Thigh Slapper on him.
by Stirp January 26, 2015
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The fuck bumper is the rounded fatty tissue above a woman's vagina on top of the pubic bone. It is technically called the mons pubis or pubic mound in Latin. It is also called the mons or the Hopkins.
"Dude, she had a soft fuck bumper. There was plenty of cushion for the pushin'."

"Check out the Hopkins on her."
by Garymx March 21, 2014
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