A word for large or perky breasts when you don't want a girl to know that you are talking about hers

When you nibble on a breast.
Tit nibbling.

tibbles, commonly used as a compliment, meaning good friend! tibbles is also a nickname of my best friend andy! he rules!!!!

The act of nibbling a breast, aka a bitty. The act of tibbling bitties.

The greatest nickname anyone could have.

When a person has only one testicle (whether it's from surgery or a birth defect), the name of that singular testicle is a tibble.

The inside of a butthole.