wigwag
/ˈwɪgwæg/verb
1wigwagged, wigwagging
no obj. US informal move to and fro〈美, 非正式〉摇动; 摆动：the wipers were wigwagging to keep the windscreen clear.
雨刷来回摆动使挡风玻璃保持清晰。
1.1
- signal by waving an arm, flag, light, or other object挥舞手臂示意; 打旗语（或灯光）信号：
Ned furiously wigwagged at her.
内德疯狂地向她挥动手臂。
词源
late 16th cent.: reduplication of WAG1.