When some one starts poppin off shots and killin people.
Yo some nigga rolled up and started clappin and now rick is dead.
Can refer to someone being killed or can refer to someone having nasty hardcore sex thus making a hard thumping noise which can resemble someone clapping their hands.
Like some clap on lights in this bitch
I'm a be clapping all night in this bitch
--Lil Wayne(Got Money)