to feel very happy.

She'd just discovered she was pregnant and she felt on top of the world.

• come down on something
• come down on the side of
• come down on the side of someone
• come down on the side of something
• come down the pike
• come down to
• come down to earth
• come down to earth with a bang
• That's all you need!
• That's a new one on me!
• that's another story
• that's it
• That's just not cricket!
• that's life
• That's more like it.
• That's my story and I'm sticking to it.
• that's news to
• That's news to me.
• that's news to you
• That's not cricket!
• That's one for the books.
• That's rich!
• That's someone all over!
• that's that
• that's the nature of the beast