An expression used to signify something good has happened, or can be used to express congratulations. Its antonym is count one for the away team.
<hohoh0> Why dont you msg your gf telling her IM GONNA GET A PUSSY AND BOOB JOB, I BET YOULL LUB ME UP. she'd think we're the most horrid people EVER eheh
<Stan> nah she would count one for the home team