Meaning of phrases "Chair slags" and "Regular two-faced Annie"

I'm translating wonderful serial to Russian.
Please help.
It's in 4 season 21 series:

Maurice sad:

74
00:03:30,120 --> 00:03:32,520
By the way, how's Eric
doing with the chair slags?

Ron answered:
75
00:03:32,800 --> 00:03:34,320
I'm covering that, Maurice.

And more:
153 (Fleischman)
00:06:35,600 --> 00:06:36,920
Beluga caviar?

154 (Fleischman)
00:06:37,360 --> 00:06:39,880
Like $50 an ounce,
beluga caviar?

155 (Ruth-Ann)
00:06:40,320 --> 00:06:41,640
Oh, will you
listen to me?

156 (Ruth-Ann)
00:06:42,000 --> 00:06:43,560
Regular two-faced Annie.

What does it mean? "Regular two-faced Annie."
Pleeeeese help