Disguising his feelings represents keeping people from knowing what his feelings are. The phrase "his lips" is a metonym for what he says. Alternate translation: "hides his feelings with what he says" or "speaks in such a way that people cannot know his true feelings" (See: [[rc://en/ta/man/jit/figs-metaphor]] and [[rc://en/ta/man/jit/figs-metonymy]])
Being deceitful is spoken of as if he were storing deceit within himself. Possible meanings are that "deceit" refers to lies. Alternate translation: "he likes his many lies" or 2) deceit refers secret plans to harm people. Alternate translation: "he secretly plans to harm people" (See: [[rc://en/ta/man/jit/figs-metaphor]])