WordWeb Online

1. Bulge outward
   "His eyes popped out";
   - start, protrude, pop, bulge, bulge out, bug out [US, informal], come out
    
2. Exit briefly
   "He popped out for a quick coffee break"
    
3. Come out suddenly or forcefully
   "you stick a bill in the vending machine and the change pops out"
    
4. Appear suddenly or unexpectedly; happen unexpectedly
   - crop up, pop up, pop, burst out

Derived forms: popped out, pops out, popping out

Type of: appear, change form, change shape, come forth, come out, deform, egress, emerge, exit, get out, go forth, go out, issue, leave

Antonym: pop in

Encyclopedia: Pop out