From Longman Dictionary of Contemporary Englishstraight from the shoulderstraight from the shoulderBritish English informal if someone speaks straight from the shoulder, they say things in a very direct way, without trying to be polite → straight
Examples from the Corpus
straight from the shoulder• The jab snaps out straight from the shoulder and bounces back immediately into high guard.• Sometimes he spoke straight from the shoulder and sometimes in puzzles and parables. 