I finally wriggled the coin out from between the couch cushions.

wriggled 是动词 wriggle 的过去式，wriggle 的意思是"扭动、蠕动"，常用来形容像虫子一样扭动身体或物体来移动的动作。这里指通过反复扭动硬币的方式把它从沙发缝里弄出来。