Boob rivers 

The elegant network of blue veins visible in some breasts.

I became in entrances by her bust's landscape: nipple peaks and the boob rivers.

Boob rivers by ApricotFields May 24, 2019

reverse boob envy 

(Noun)
The resentful desire of another woman's smaller breasts. The opposite of the more common and well-known boob envy, in which a woman envies another female's bigger boobs. Reverse boob envy, also known as small boobs envy, is not well known to most men, but is felt by many women to be true, since small breasts are often more practical, and not seldom just as beautiful as bigger jugs.

"Lovely picture of these two girls! Rare example of reverse boob envy. Look at that girl, envying her gorgeous flat chest."

reverse boob envy by Monticello-W October 21, 2016

Reversed Boob Graze 

The active/aggressive equivalent of a normal boob graze.

The physical act where a female object uses her breasts to rub against any body part of a man. The purpose of this seemingly accidental act can be purely to obtain sexual gratification or to attract male attention. The "grazee", once realized what's going on, usually feels violated, but rarely receives sympathy.

Brian sobbed "I thought I went for an innocent massage by a sweet old Thai lady, I couldn't believe she gave me a serious reversed boob graze on my face. I feel sick......"

Reversed Boob Graze by Lulu Thompson October 18, 2008

Reverse Boob Sign 

An inversion of a commonly-seen chatroulette sight, a sign requesting female nudity to be shown (usually divided and tallied by body parts). This sign instead asks what part of a female one wishes to see, at which point it is shown.

Only a small handful of Reverse Boob Signs have ever been documented,

Reverse Boob Sign by Kinali and Tiri0n June 17, 2010