roach tennis
The act of fumigating (bug bombing) your apartment thereby sending your roaches fleeing into the adjacent apartments only to have them fumigate shortly afterwards sending what's left of yours plus theirs back into your place. This process is repeated until someone runs out of money for bug bombs. The first person to do so loses the game and gets stuck with the majority of the roaches.
Johnny had been saving up to buy an entire case of bug bombs and felt certain he could win this months game of roach tennis