BRAINS OUT, BLOWING (ONE'S)

(informal) killing (oneself) by a shot through the head. Used figuratively. —Academy Level IV Glossary, —OEC - Suppressives and GAEs Glossary Appr. 25 Feb. 91

(informal) killing (oneself) by a shot through the head. Used figuratively. You're blowing your brains out trying to find this little thing: "Do you have the trim knob set exactly right?" and all that sort of thing.