1. Leave quickly
   "When the alarm sounded, everyone popped off";
   - bug out [US, informal]
    
2. Cease to live
   "The old man popped off in his sleep";
   - die, decease [archaic], perish, go, exit, pass away, expire, pass, kick the bucket [informal], cash in one's chips [informal], buy the farm [N. Amer, informal], conk [informal], give up the ghost [informal], drop dead [informal], croak [informal], snuff it [informal], cash in [informal], cop it [Brit, informal], flatline [informal], pop one's clogs [informal], pass on

Derived forms: popped off, pops off, popping off

Type of: change state, go away, go forth, leave, off [informal], turn