Wall or ceiling panel, which, on one side edge of the panel, comprises a male coupling part and, on an opposite side edge of the panel, comprises a female coupling part, wherein the coupling parts are configured such that two of such panels, by means of the coupling parts, can be coupled to each other in a plane and thus a coupled condition can be realized between the panels; wherein the male coupling part comprises a tongue and the female coupling part comprises a groove, which tongue and groove, in the coupled condition, form a tongue and groove connection, which realizes a mechanical locking between the panels in the direction perpendicular to the plane of the panels; wherein the groove is bordered by a front lip and a rear lip; and wherein the coupling parts each comprise a locking part, which locking parts, in the coupled condition, realize a mechanical locking between the panels in the direction in the plane of the panels and perpendicular to the side edges; optionally wherein the panel is adapted to form a ceiling-high wall panel and/or optionally has a length of at least 2400 mm; wherein the panel shows the feature that the rear lip is configured such that the rear lip, or at least a part thereof, can bend in rearward direction, even if the panel or the rear lip is secured to a flat substructure; wherein the male coupling part and the female coupling part are realized partially, and preferably entirely, of the material of the panel and in one piece therewith; wherein the male coupling part and the female coupling part are adapted to be realized by means of cutting or milling treatments; the rear lip extends in distal direction beyond the open or free end of the front lip; wherein the coupling parts are of the turning type, preferably with snap or click effect; wherein the rear lip, at the rear side thereof, is provided with a recess which allows the aforementioned rearward bending of the rear lip or at least a part thereof; wherein the panel is wood-based, characterized in that the part of the rear lip which, in distal direction, extends beyond the open or free end of the front lip, is longer than the thickness of the panel; wherein the most proximally situated point of the recess is situated at a distance different from zero from the open or free end of the front lip. wherein the male coupling part and the female coupling part are realized partially, and preferably entirely, of the material of the panel and in one piece therewith; wherein the male coupling part and the female coupling part are adapted to be realized by means of cutting or milling treatments; the rear lip extends in distal direction beyond the open or free end of the front lip; wherein the coupling parts are of the turning type, preferably with snap or click effect; wherein the rear lip, at the rear side thereof, is provided with a recess which allows the aforementioned rearward bending of the rear lip or at least a part thereof; wherein the panel is wood-based, characterized in that the part of the rear lip which, in distal direction, extends beyond the open or free end of the front lip, is longer than the thickness of the panel; wherein the most proximally situated point of the recess is situated at a distance different from zero from the open or free end of the front lip.