Speaking during a rally less than 24 hour before the UK heads to the polls, the Scottish Tory leader said the First Minister had resorted to "scoring cheap political points" in revealing the private conversation, which Kezia Dugdale has denied, in a television debate.
She said: “I’ve thought many things about Nicola Sturgeon but I never thought she was a clype.
"I never thought she was a woman you couldn't have a private conversation with, but I know now."
Ruth Davidson accused Sturgeon of being a clype Election 2017 LIVE Wed, May 31, 2017
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I’ve thought many things about Nicola Sturgeon but I never thought she was a clype
A clype is a person that tells stories and tales.
Her scathing attack comes after the SNP leader made a bombshell claim that Ms Dugdale spoke of her support of a second Scottish independence referendum in a private phone call in the wake of the Brexit vote.
During a STV debate last night, Ms Sturgeon told Ms Dugdale: “You and I spoke the day after the EU referendum and you told me then that you thought the change with Brexit meant that Labour should stop opposing a referendum.”
Ms Dugdale hit back saying Nicola Sturgeon was a "liar" and her claims were untrue.
She wrote on Twitter that "any suggestion that I ever said to Sturgeon that I'd change Labour's position on £indyref2 is a categoric lie", claiming this shows how "desperate" the First Minster is
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Ruth Davidson speaks on last full day of election campaigning
Ms Davidson said: "One thing she did tell us was something that we didn't even need to know, and that was that the Labour Party can't be trusted on the union.
"We don't need to hear private conversations to know what's been said already in public.
"Kezia Dugdale saying that she was quite happy for her MPs and MSPs to vote for independence – on the record saying that Brexit meant that she considered it herself.
"Jeremy Corbyn saying that he was absolutely fine with a second referendum, a couple of weeks later saying that he would open discussions with the Scottish Government about it.
Ruth Davidson delivered an impassioned speech
Questioned on what the intervention says about Ms Sturgeon's character, Ms Davidson said: "People will make a decision themselves if it talks to character, that if someone will tell a private conversation that happened at a really important time of Scotland's political history a year later to score a cheap political point, people will make their own mind up."
Ms Davidson said the First Minister and the SNP are "rattled" as they see the "crumbling" of their influence following the 2015 General Election landslide.
She appealed to voters to back her party to stop a second independence referendum, saying it would allow Scotland to "move on and have a bit of peace"
Sturgeon made the bombshell claim during a STV debate
Ruth Davidson also urged Scots to help "silence" Ms Sturgeon's "hollow claims" over a second independence referendum in an impassioned polling day rally cry at the Glasshouse Hotel in Edinburgh.
She told Conservative activists not to let her down because she can "do a job for Scotland".