It means like the person that someone has on the side not including his or her girlfriend or boyfriend.
I text my friend really late at night. Just to see what was going on. Her boyfriend then asked if I was her "Side Meat".
Libreng Koreo Araw- araw
Ang mga sulat are galing sa firstname.lastname@example.org. Kailanma'y hindi kami magpapadala ng spam sa inyo.