From Longman Dictionary of Contemporary Englisha touch disappointed/faster/impatient etca touch disappointed/faster/impatient etcLITTLE/NOT VERYslightly disappointed, faster etc He sounded a touch upset when I spoke to him on the phone. → touch
Examples from the Corpus
a touch disappointed/faster/impatient etc• He was fond of the man who fretted beside him, and a touch impatient with him too. 