I've seen those two words several times on these boards, but what the heck do they mean? I think TOM means time of the month??? and I have no idea what OP stands for, maybe on patrol??? lol. Clear this up for me would ya?

You are right about TOM (although I'm not too fond of this paticular expression since it's a MAN's name). And OP stands for on plan/program.

And here's the informative all-inclusive free of charge list of acronyms:

http://www.3fatchicks.com/forum/showthread.php?t=83585

Don't feel bad - I didn't know what AF meant for ages (Aunt Flo - related to TOM!!)