Barry Bonds doesn't just want his former MLB team to play well against the Philadelphia Phillies in the upcoming NL Championship Series -- dude hopes the San Francisco Giants "beat their ass!"

Barry was out in Santa Monica, CA yesterday gushing about his former squad  ... telling us, "I don't really have fans in SF, I have family ... so if you think I'm going for Philadelphia ... forget it!"

And even though he spent 7 seasons with the Pittsburgh Pirates, Barry told us, "I'm a Giant for life!"