irreverent

ir|rev|er|ent /ɪr'evərənt/
[ADJ]
If you describe someone as irreverent, you mean that they do not show respect for people or things that are generally respected.
Taylor combined great knowledge with an irreverent attitude to history.
● irreverence [N-UNCOUNT]
His irreverence for authority marks him out as a troublemaker.
● irreverently [ADV] ADV with v, ADV adj
`Jobs for the boys,' said Crosby irreverently.