Obombing 

The act of sending a Barack Obama gif to someone in an effort to piss them off.

I made my wife mad on messenger and now she's obombing me and she won't stop.

Obombing by CreepyNomad March 27, 2020

O-Bombing 

The act of throwing change at another individual, more often than not directly in their face where they are less likely to expect it

Being short on singles, Nick decided to go O-Bombing at his local gentlemens club

O-Bombing by Harry Savage November 1, 2010