cold-cock['kəuld,kɔk]

• vt.[美国俚语]把…打昏，(用拳头或棍棒)把…打倒：

  The barkeeper cold-cocked the drunk from behind and the bouncer carried him out.

  酒吧店主从背后将醉汉打昏后，酒店保镖把他抬了出去。