Reid (D-Nev.) took aim at the 2008 GOP vice presidential nominee, who joined Tea Party ralliers in Searchlight, Nev., to campaign against Reid, the top Democrat in the Senate.
"I was going to give a few remarks on the people who were over here a week ago Saturday," Reid said in a video posted by Fox News anchor Greta Van Susteren, "but I couldn't find it written all over my hands.
"You betcha," Reid added to supporters' laughter, mimicking one of Palin's trademark slogans.
Reid's in a tough reelection battle in Nevada this fall, and has been targeted by conservatives who hope to unseat Senate Democrats' leader for the second time in seven years, having defeated Sen. Tom Daschle (S.D.) in 2004.
Palin joined conservative personalities like Andrew Breitbart to rally against Reid in late March.
Van Susteren has a longer, sit-down interview with Reid set to air on Fox on Monday evening.