(pickup community) An expression or implication that one has a negative value judgement of someone in order to make them desire one's approval, especially when trying to pick up a date.

Deliberately annoy, irritate.

(pickup community) To express or imply a negative value judgement of someone to make them desire one's approval, especially when trying to pick up a date.

To leave negative feedback in a reputation tracking system.

“I negged the seller who didn't send me the widget I paid for.”

(public health) HIV negative

Refusal or withholding of assents; prohibition, veto

A right of veto.

An image in which dark areas represent light ones, and the converse.