to fight at close quarters; to fight tooth and nail

to hang out or spend time with others, typically in an aimless or improper manner (derogatory)

to stay together; to rely on one another

to come to blows; to tussle

(literary) underage male servant

to stay together for a lifetime (usually of a couple)

To play together frequently and intimately during childhood, especially referring to a boy and a girl growing up together as close companions.

to pester

familiar with one another

to come to blows; to fight; to tussle

this so-and-so; this guy (often derogatory)

that so-and-so (usually derogatory)