吊威亚是指影视特技中用于悬吊的钢丝绳，源出香港影视制作界，吊wire（钢丝）。香港口语中习惯采用国语与英语混用的词汇，如本词，传入内地后形成业界统称。影视剧中的人物腾空、飞跃及空中武打镜头常常要通过吊威亚实现，后期剪辑阶段再处理掉。

Wire fu is an element or style of Hong Kong action cinema used in fight scenes. It is a combination of two terms: "wire work" and "kung fu."

Wire fu is used to describe a subgenre of kung fu movies where the stuntmen's or actor's skill is augmented with the use of wires and pulleys, as well as other stage techniques, usually to perform fight-scene stunts and give the illusion of super-human ability (or Qinggong). It is exemplified by the work of Tsui Hark, Yuen Woo-ping, and Jet Li, that has subsequently been appropriated by the Hollywood film industry. Almost all modern wuxia movies fall in this category. Not all martial arts films use wire work.