What is the meaning of Bub?

An alcoholic malt liquor, especially beer.

A woman's breast.

A term of familiar address; bubba; bubby.

A young brother; a little boy; a familiar term of address for a small boy.

A baby.

Clipping of bubble.

Clipping of bubbly; champagne.

To throw out in bubbles; to bubble.

chest

fish trap

bovine (animal), bull, cow

Source: wiktionary.org