Maudlin
Etymology
A worn-down form of "Magdalene," from Mary Magdalene, whom medieval art almost always depicted weeping in penitence. Her name, pronounced "MAWD-lin" in English, came to suggest a state of tearful emotion. Over time it drifted from pious weeping to sloppy, excessive sentimentality — including the teary kind that comes over some people after a few drinks.
adjective · /MAWD-lin/
Tearfully or weakly sentimental, often in a self-indulgent way.
What it names
Sappy, overflowing emotion that has tipped past sincerity into embarrassment — reach for it for sentimentality that is mushy rather than moving, sometimes fueled by drink.
Example
After the second toast he turned maudlin, dabbing his eyes over friendships he’d barely thought about in years.
Related idea
Sentimental can be tender and genuine; maudlin is sentimentality gone soft and cloying, tipping into mawkishness the listener finds uncomfortable.