1) Boy toy, usually 2) Comics anthology 3) Cork launcher 4) Cork shooter 5) Juvenile weapon 6) Loud toy 7) Noisemaking toy 8) Noisemaking toy weapon 9) Plaything 10) Toy with a cork 1) Toy 
• (n.) A child`s gun; a tube and rammer for shooting pellets, with a popping noise, by compression of air.
Pop'gun` noun A child's gun; a tube and rammer for shooting pellets, with a popping noise, by compression of air. 
[n] - plaything consisting of a toy gun that makes a popping sound
noun plaything consisting of a toy gun that makes a popping sound