To leave a room or building with the expectation of returning soon.(verb)
To be retired after three strikes, including a popouts (pop fly) on the third strike.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "pop out" in a sentence
"And the bit where he petitioned the Disney Company to open a “Vietnamland,” where you could chuck phosphorous grenades into tunnels and animatronic screaming yellow flamers would pop out and perish in the foliage?"
"But Castillo, staggering like a drunk to his left to make the play, had the ball pop out of his mitt, scoring Derek Jeter, the runner from third."
"“And,” the woman continued, “I suppose one of the under-wires in my bra might pop out and poke him in the eye . . .”"