Effusive (adjective)

Overly or excessively demonstrative in expressing feelings or opinions; gushy.

Origin:

Late 17th century: from latin effusus "poured out" (from effundere "pour out") + -ive.

Examples:

1. She was effusive in her praise of the new product.
2. He was effusive in his apologies.
3. The effusive greeting was overwhelming.
4. The effusive emotions were hard to contain.
5. Effusive people are often seen as insincere.