Mawkish (adjective)

1. Excessively sentimental or emotional in a way that is perceived as insincere, cloying, or nauseating.
2. Having or displaying a sickly or over-sentimental sentimentality.
3. Having a sickly or unpleasant taste, smell, or quality.

Origin:

The word mawkish comes from the middle english word 'mawke' which means maggot, and has evolved to also mean something that is nauseating or distasteful.

Examples:

1. The mawkish love song played on the radio made her roll her eyes.
2. The mawkish sentimentality of the Hallmark movie was too much for him to bear.
3. Her mawkish attachment to her childhood teddy bear was a source of amusement for her friends.
4. The mawkish smell of the flowers was making her feel sick.
5. The mawkish taste of the over-sweetened dessert made her regret ordering it.