送頭 [－头]

Jyutping sung3 tau4
Pinyin sòng tóu

Definitions (粵典–words.hk)
  1. 動詞、潮語
    冇​意義​咁​主動​犧牲
    to sacrifice oneself in a meaningless way; literally: to send one's own head
Definitions (Wiktionary)
  1. verb, verb-object
    to feed; to allow the opponent to kill oneself, sometimes deliberately