Source : WordNet®

pop out
     v 1: appear suddenly; "Spring popped up everywhere in the valley"
          [syn: {burst out}]
     2: come forth or out; "You stick the coins in, but they come
        out again"; "His hair and teeth fell out" [syn: {come out},
         {fall out}]
     3: bulge outward; "His eyes popped" [syn: {protrude}, {pop}, {bulge},
         {bulge out}, {bug out}, {come out}]
     4: exit briefly; "He popped out for a quick coffee break" [ant:
         {pop in}]