To overturn or flip, describing a physical motion in which the lower part passes over the top, analogous to turning end over end or going head over heels.
2.
General Englishinformal
Figuratively, to undergo a sudden reversal of position, status, or orientation; to be turned from expected order into its opposite.
Examples:
EN: Oh, Barn, you went base over apex then!
ES: ¡Barn, se te ha acabado antes de tiempo el viaje!