From Yahoo! News:
Sen. Saxby Chambliss of Georgia, the top Republican on the Senate Intelligence Committee, said he was “encouraged” by Obama’s strong rhetoric but took a veiled shot at the president’s vow not to send in combat troops.
“We cannot afford to rule out military options or allow ISIL to make any further progress. Our unequivocal and unrelenting goal must be to pursue these terrorists wherever they go and destroy them,” said Chambliss.
I tried to look it up but I couldn't find anything because there was literally no dictionary out there that had this expression.