to patch up one's lie (when inconsistencies appear)
to cover (for sb who has lied)
Definitions (CC-CANTO)
to conceal the loopholes in a lie
Definitions (粵典–words.hk)
動詞
為咗掩飾講過嘅大話裏面嘅漏洞同矛盾,去講或者去做一啲嘢 to cover up a lie
為咗段關係,我冇辦法唔去再講一啲大話嚟圓謊。
为咗段关系,我冇办法唔去再讲一啲大话嚟圆谎。
wai6 zo2 dyun6 gwaan1 hai6, ngo5 mou5 baan6 faat3 m4 heoi3 zoi3 gong2 jat1 di1 daai6 waa6 lai4 jyun4 fong1. For the sake of the relationship, I have no way but to cover up the lies I told before.
Definitions (Wiktionary)
verb
to cover up a lie; to cover up or attempt to justify the inconsistencies in a lie