Booster shot 

Putting off the inevitable for as long as possible.
Procrastinating or looking for an excuse to delay making a decision or doing something necessary.
Based on the much questioned excuse used by the Western Australian premier to delay opening his state in 2022.
In that state it hit cult status quickly and became a sarcastic excuse given for apathy or to buy some time

"Sam have you finished your homework?" "No Mum I'm waiting for my booster shot haha"
"have you guys set a date yet?" "no we still aren't sure" "WTF? Are you guys waiting for a booster shot!!?"
"John any chance of you doing the rubbish this year!?" "yeh sure, soon as I get my booster shot"
"Typical tradie didn't show up!, maybe he was getting his booster shot!"
"Those doona dwellers in the hermit kingdom aren't going anywhere! Haha, cause They're waiting for their booster shots!"

Booster shot by ATM4 January 29, 2022

human booster shot 

To be victimized in the degrading, yet hilarious act, of forced anal sex from a very large man while detained or incarcerated.

Friend One- "Dude, don't get caught again."

Friend Two- "Yeah Bro- you would really be up shit creek."

Friend One- "Yeah. Larry will be giving you a human booster shot."

human booster shot by Raven Von Stanswick March 20, 2008

Covid-19 Booster Shots 

When pharmaceutical companies wish to administer them at least twice a year, which means that they want their vaccines to start losing their effectiveness after every six months, so that they could generate as much profit as possible—more shots, more sales.

The answer to “Would Covid-19 booster shots be needed to protect the public against the variants?” is a no-brainer to vaccine producers.

Covid-19 Booster Shots by MathPlus July 6, 2021