呶呶唧唧 náonáo-jījī
[hem and haw;mince matters(words);speak in a halting way;stumble over one's words] 吞吞吐吐
赵树理 《李有才板话》七:“﹝ 老杨 ﹞问他道:‘你还等谁?’他呶呶唧唧道:‘不等谁了!’说着就溜走了。”