flippant
adj.轻薄的，轻浮的；无礼的；油头滑脑；轻口薄舌
网络解释.轻薄的；蚂蚁和桌布；轻率的；无礼的
adj.1.无礼的;傲慢的释义下的同义词
disrespectful rude saucy cheeky impudent cocky flip pert smart-alecky
serious
双语例句
1. 1 . I didn't mean any offence. It was a flippant, off-the-cuff remark.
我本无意冒犯，那不过是句脱口而出的冒失话。
来自柯林斯例句