Careless and unsystematic; excessively casual. His sloppy approach to the project resulted in numerous errors.
The room was left in a sloppy state after the party.
Containing too much liquid; watery. The soup was too sloppy to eat with a fork.
Excessively sentimental or mawkish. She enjoys watching sloppy romantic films that always make her cry.
Loose-fitting, baggy, or overly casual in style (of clothes or the way they are worn). He showed up to the meeting in a sloppy sweatshirt and wrinkled jeans.