squiggle
noun [ C ] uk/ˈskwɪɡ.əl/ us/ˈskwɪɡ.əl/
（写或画的）弯弯曲曲的短线条
a short line that has been written or drawn and that curves and twists in a way that is not regular
His signature was an illegible squiggle at the bottom of the page. 他的签名就是页末那些弯弯扭扭、难以辨认的线条。