A former Marine was stabbed outside a Midtown bar Wednesday when a Veterans Day argument with other service people spilled onto the street, sources said.

Alfonso Matos, 35, was inside the Turtle Bay Bar when a fight erupted and a group of men was ejected, according to police sources.

“You’re a disgrace!” yelled Matos, who objected to them drinking in uniform, a witness said. Matos was stabbed by a patron and taken to Bellevue Hospital, where he was in stable condition, the sources said.