Upper Leg Lower Back. When a person has a butt so small/flat, it’s like their back connects directly to their leg.
It’s hard to spank Jeff because of his ULLB.

I need a belt, my ULLB makes it impossible to wear pants that won’t fall down.
by Whosaidwhat June 6, 2021
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Pronounced You'll Be, generally a short length of a hard substance kept underneath or behind your car/truck seat for emergency defence.
You'll be fucked if I need to adjust your attitude with my ullb
by Shpongle99 April 3, 2023
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