3 sentences

1. 他是个彻头彻尾的孬种。

   tā shì gè chè​tóu​chè​wěi de nāo​zhǒng.

   He is a complete coward.

   Source: Dong Chinese Dictionary

2. 简直是彻头彻尾的犯罪！

   jiǎn​zhí shì chè​tóu​chè​wěi de fàn​zuì!

   It was downright criminal!

   Source: OpenSubtitles

3. 他是个彻头彻尾的骗子。

   tā shì gè chè​tóu​chè​wěi de piàn​zi.

   He is a liar through and through.

   Source: Dong Chinese Dictionary