抽插 [－－]

Jyutping cau1 caap3
Pinyin chōu chā

Definitions (CC-CEDICT)
  1. to slide in and out
  2. thrusting
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. verb
    to pull out and insert (as in sex)