тупорылый(rude slang. To be acting in a way that others deem stupid. Primarily heard in US.
: He has his head up his ass if he thinks we can get all of this work done in one night.thefreedictionary.comDominator_Salvator)
до тонкостей(I could play almost every song, man, I know country music up the ass – Я мог бы исполнить любую песню. Я знаю музыку в стиле "кантри" до тонкостей VLZ_58)