Halle Berry, Gabriel Aubry -- Duking it Out in Child Support Trial

Halle Berry is in court in a face-off with baby daddy Gabriel Aubry, and she wants a judge to tell him in no uncertain terms ... she's no longer his meal ticket.

Berry's child support trial begins this morning. TMZ broke the story ... Halle wants the judge to reduce the child support she's paying Gabriel from $16,000 a month to somewhere closer to the neighborhood of $3,000 a month.

Berry has groused Gabriel needs to get a job and pay his own freight. She says she's happy to pay him to properly care for 7-year-old Nahla when he has physical custody, but she says he's using the money to avoid work.

Aubry has been a successful model, but says he lost a lot of work after Halle's then-fiance/now hubby, Olivier Martinez, beat his face in.

Halle and Gabriel have joint custody.