Study of cum, jizz, semen.
Could be from watching people masturbate so many times or pleasuring others until cum comes out.
Or in case of some girls, sucking dicks so many times, and so much cum is in her mouth that she could study it.
1.the act of doing BULLSHIT things or saying stupid things
2.using language that you shouldn't around ladys or family
3.an act which is completely stupid