What does (___:___) stand for?

(___:___) stands for "A large bottom"

How to abbreviate "A large bottom"?

"A large bottom" can be abbreviated as (___:___)

What is the meaning of (___:___) abbreviation?

The meaning of (___:___) abbreviation is "A large bottom"

What does (___:___) mean?

(___:___) as abbreviation means "A large bottom"