Top definition
Fuck the first definition. A breast boner is when your nipples get hard.
It was so cold, I got a breast boner.
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug
2
A nice pair of tits that you would like to titfuck.

Breast you dream of sticking you dick in and fucking
I'm not into tit fucking, but there was one bitch who gave me a breast boner.
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug