Yesterday I was reading 孟母三迁。 (Your environment has a big effect on your development seems to be the underlying theme.)
I can't find 哭拜， so I suppose it is a contraction of something. Maybe 哭泣 + 膜拜，祭拜。 Together I presume it means 'mourn'.
Asking around I find, in China it is not unusual to pay someone to cry at a funeral. Are these people professional mourners? 哭拜者？ Is that what 孟子 was studying, professional mourners?