butt chub Share definition Flag When your panty line is accentuated by your tight pants creating a muffin top of the butt cheek. Creating the "butt chub" "Wow, these panties are giving me some major butt chub" butt chub by RedneckNinja1 February 12, 2015 0 0 Get merch Get the butt chub mug. Buy Now — $32.95 See more merch