Tighty Whities refers to Trump's underwear as described by someone other than his wife.

Citation & Attribution:
"Frustrated Donald Trump, clad in a plush red bathrobe with golden tassels, stands with his back to a lavish bed, its gold headboard gleaming in the dim light, and a vibrant pink bedspread rumpled from recent disturbance. His gaze is fixed on the partially open top drawer of a dresser to his left, its ornate woodwork adorned with gilded hardware. A woman's curious face peers out from beneath the bed, her features obscured by shadows. On the right, a doorway leads to a bathroom, its threshold bathed in a soft, ethereal glow."
Flux Pro, Black Forest Labs, 1 March 2025