not on

Phrase

 * 1)  Unacceptable or impossible.
 * 2) * 2003, Dan Connell (author), Lionel Cliffe and Basil Davidson (introduction), Taking on the Superpowers: Collected Articles on the Eritrean Revolution, 1976-1982, page 325,
 * After a week or so, he and I determined that walking hundreds of miles behind guerrilla lines under these conditions was just not on for him, and he packed his equipment to return home.
 * 1) * 2003, Dan Connell (author), Lionel Cliffe and Basil Davidson (introduction), Taking on the Superpowers: Collected Articles on the Eritrean Revolution, 1976-1982, page 325,
 * After a week or so, he and I determined that walking hundreds of miles behind guerrilla lines under these conditions was just not on for him, and he packed his equipment to return home.