Definitions

1. adjective

most given to gushing or overflowing with something (such as tears, words, etc.)

“The gushiest fan in the crowd cried uncontrollably when the singer took the stage.”

2. superlative adjective

used to compare three or more adjectives of the same degree, forming the superlative degree of gushy

“The movie has been criticized for being the gushiest romantic comedy of the year.”