2. (adjective) - To have a brain that is completely devoid of common sense and significant thought.
3. (adverb) - To be so self-absorbed that the needs of other people or dependants are never considered before making a decision or taking action.
4. (adverb) - To act in a self-satisfied manner
5. (adverb) - To behave a in a manner that is meaningless
to other people
Your would think that his vacuous mother would care more about his well being than focusing on keeping a great tan.