Someone Shoot Me!

Real-life situation, this time. I was at work the other day and had just done something. I needed to tell a coworker he needed to do it as well, but he was on the phone at the time.

Not wanting to wait around til he was done nor interrupt his conversation, I got his attention and gestured. First, I gestured the way I had came, then I formed my right hand into a gun pointing directly at my forehead and mimed pulling the trigger. My coworker nodded, finished up his phone call, and went to get it taken care of.

I wasn't telling him to get himself killed, so what was I telling my coworker to do?

• To assassinate your much hated Boss – Deepthinker101 Sep 29 at 6:06
• Metaphorically killing his dignity by continuing to wage-slave in a toxic, underpaid work environment with too much required overtime, and starting with that by stopping to talk to his friend at the phone? – Lukas Rotter Sep 29 at 6:18
• Sorry, but I also have to point out the obvious nsfw answer, you can think of it yourself: 'The way he had came' + 'shot'........ – Lukas Rotter Sep 29 at 6:29

If you flapped your arms to gesture that you $$\underline{\quad A\quad}$$ in and indicated that you got $$\underline{\quad B\quad}$$ . . .
$$~~~A~~$$ = “flew” $$~\to~\,$$ $$A'$$ = “flu”
$$~~~B~~$$ = “shot”
$$A' ~ B$$ = “flu shot”
. . . . then you reminded your coworker to get their annual company-sponsored $$\underline{\quad A' ~ B\quad}$$.