Advice is a dangerous thing to give, yet that's what we're all about on here. However, I'll take my shot at giving a bit....
As the previous poster noted, lying will seal your fate against you. Lying on any applications anywhere, whether job, scholarship, or college, can seriously hamper your credibility in the future. Hey, we make mistakes. It sucks, but we have to deal with it. It'll be a sweeter pill going down if you're at least honest about it.
My advice is that if you're still serious about medical school, I'd go back to graduate school and try to make that bit up. It's not impossible to get into medical school after an academic probation/dismissal, but it *really* helps to do something to show that you've learned from that mistake and have made up for it. Toss in the usual rigmarole about extra curriculars, volunteer experience and yadda yadda, but be sure to have a stellar graduate term next time around.
Best of luck in everything.