Definition of sup

• v. t. - To take into the mouth with the lips, as a liquid; to take or drink by a little at a time; to sip.
• n. - A small mouthful, as of liquor or broth; a little taken with the lips; a sip.
• v. i. - To eat the evening meal; to take supper.
• v. t. - To treat with supper.