"will smithing" aka "pulling a will smith" is the act of over reacting to something after seeing that your wife is unhappy about it (even if at first you didn't seemed to care), sometimes even resorting to physical violence, shouting and being overall meme worthy.
a: "bro did you saw the oscars last night? Jada Pinkett's cuck husband pulled a will smith on Chris Rock"
b: "dammm really? Will Smith be will smithing"
A sexual act between consenting adults where the one partner slaps the face of the other partner and then sits down and yells "Get my dick in your mother fucking mouth".