A form of irony, where someone expresses disinterest or refusal to something, although deep down the said person has a desire for the thing
"Dude look, that homeless dude rejected 1000 dollars from Mr. Beast"
"He's probably experiencing Accismus"
Accismus means the feigned disinterest in something you secretly want or long for.
"No way, that guy rejected his crush, Accismus is gonna hit him hard"