Getting a compliment from your effusive Aunt Sally can be a little embarrassing. Since she's so effusive, Aunt Sally holds nothing back, gushing with enthusiasm.

The adjective effusive means "extravagantly demonstrative," and if you know someone who know who expresses positive emotions in a heartfelt, bubbly way, you understand just what it means. The word effusive has a surprisingly similar definition in geology; it describes a particular kind of volcanic eruption, one in which lava bubbles up out of the volcano and flows around it.

Definitions of effusive

adj uttered with unrestrained enthusiasm

burbling, burbly, gushing
full of life and energy

adj extravagantly demonstrative

“insincere and effusive demonstrations of sentimental friendship”
gushing, gushy
given to or marked by the open expression of emotion