Thighbum 

n. (thahybuhm)
Lack of definition between the bottom and thigh. The appearance of bottom and thigh merging into one shapeless mass. Typically this condition is most noticeable when the subject wears jeans.

Dude she's hot!
Not from behind. She's got a thighbum.
Oh my god - it's like two straws connected to her back.
----- ----- -----
Does my bum look good in these jeans?
No sweetie. It's like two pancakes vacuum-packed in denim.
Not my thighbum!!

Thighbum by Miss Tessmacher October 7, 2010

Thighburns 

Patch of hairless skin on a man's cheek from the continuous rubbing of the inside of female's thighs during oral sex.

I can't grow a full beard because of my thighburns.

Thighburns by axismob July 1, 2010

thighburns 

Thighburns a grossly ungrooomed womens pubic region. Where the pubic hair proceeds to grow down the thighs in an uncontroled manner.

Check out that fat bitch's thighburns. European women are notoriuos to the self afflicted thighburns epidemic.

thighburns by poopface December 3, 2003

Thighburns 

Excess hair growth on a womens inner thigh area. Particularly previlant amongst older and dark haired laydees

I was charged double for a leg wax as my thighburns met in the middle

Thighburns by Hudders1999 October 16, 2008