To be “boohooey” means acting in a way that seems overly emotional, tearful, or theatrically upset, especially over something others see as minor. It usually carries a mocking or dismissive tone, implying that the person is making too much of the situation.
The word points less to genuine sorrow and more to the appearance of exaggerated weeping, fussing, or self-dramatizing behavior. Someone described this way may be seen as turning a small inconvenience into an emotional performance.
Because of that, “boohooey” is not a neutral description. It reflects judgment. It suggests that the emotion being shown is excessive, trivial, or meant to attract sympathy rather than express serious pain.
In everyday use, the term reveals as much about the speaker as the person being described. It can be used playfully, sarcastically, or critically, but it almost always minimizes the feelings involved. So while it refers to weepy or overdone emotion, it also carries the social message that the reaction is not being taken seriously.
As a final thought, “boohooey” is a word for emotion that is viewed not as deep or moving, but as too much, too showy, or too small in cause to deserve such a display.