Basically they are posts for brides to show off the professional photos after they get back from getting married. So usually its a month or two after they are back from the honeymoon and got their wedding albums from the photographer.
Omgeee that is SO dorky. I was wondering the same thing? pro bam? non pro bam? what the?? good lord. SO cheesy. Wow, people think it's cool to say that? hahaha. Too funny. Just like people posting questions about their STD's hahahahahaha, do you know what STD's is traditionally an acryonym for, people?! did ya take a health class in high school?! come on. biiiiiig eye-roll from me on this 'lingo'. Just type out save the dates. and FH, future husband, geez... it's not saving you that much time to abbreviate.