squirm / skwərm/ • v. [intr.] wriggle or twist the body from side to side, esp. as a result of nervousness or discomfort: all my efforts to squirm out of his grasp were useless. ∎ show or feel embarrassment or shame.• n. [in sing.] a wriggling movement.DERIVATIVES: squirm·er n.squirm·y adj.