"Watch What Happens Live" is known for getting B, C and D-list stars to dish dirt on each other -- but last night the show snagged an A-list guest: Meryl Streep ... and she didn't disappoint!

Streep was more than game when it came time to play "Spill the Tea," where guests are asked to say the first thing that comes to mind about their costars when their photo flashes on the screen.

While Meryl had great things to say about all of the faces that popped up, she paused when she saw Lindsay Lohan (her daughter in "Prairie Home Companion") ... saying "I pray for Lindsay."

She also played Andy Cohen's famous "Plead the Fifth" -- where stars have to answer three personal questions, with the option of skipping only one.

Meryl didn't chicken out though, answering all three ... including who she'd "Marry, Shag and Kill" between Jack Nicholson, Robert Redford and Dustin Hoffman.

Let's just say it doesn't end well for her "Kramer vs. Kramer" costar.

Watch the video above!

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