To simp
American SlangDefinition
To show excessive, ingratiating attention or devotion to someone—often a romantic interest—in a way seen as desperate or subservient, typically without reciprocation.
Examples
"He keeps simping for his coworker—buying her lunch, running her errands, and showering her with compliments—even though she barely acknowledges him."
"Stop simping in her DMs; she leaves you on read every time and never makes an effort to reply."
"After the livestream, he was simping for the influencer hard, tipping repeatedly and defending her online, even though she doesn’t know who he is."