verb / noun
gloat
GLOHT/ɡləʊt/
Taking smug pleasure in one's success or another's misfortune.
The older woman gloats over her winning pieces before her dejected opponent.

Etymology
Gloat probably began as a variant of glout, meaning to stare or scowl. Looking furtively developed into looking with malicious satisfaction, shifting the emphasis from the gaze to the smug pleasure behind it.
In context
they would harass you and harangue and hector and and set you up for failure and defeat and then gloat with glee at your misadventures and mishaps
More examples
- Don't gloat over someone else's bad luck.
- They are still gloating about their perfect scores.
- After beating me at chess, she allows herself a brief gloat.
Forms
gloat · gloats · gloated · gloating
gloater noun — Someone who takes or expresses smug pleasure.