then and there
then and there definition by American Heritage Dictionary
adverbThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
At that precise time and place; on the spot: resigned then and there.
then and there - Phrases/Idioms
Also, there and then. At that precise time and place; on the spot. For example, When the board questioned his judgment again, he resigned then and there. The first term was first recorded in 1442, the variant in 1496.