The line comes from Point Break, the 1991 surf crime film starring Keanu Reeves as undercover FBI agent Johnny Utah. Utah says Vaya con Dios to Bodhi at the end, releasing him to ride a giant wave he likely will not survive. Clipped from that farewell, the phrase has circulated online as a reaction sound for respectful, dramatic goodbyes. Its meaning, go with God in Spanish, and the calm delivery keep it useful for edits where a simple goodbye feels too small.