Wiktionary
able to get a word in edgewise
a. (context idiomatic colloquial English) Able to participate in the conversation; able to interrupt another person's monologue.
Usage examples of "able to get a word in edgewise".
Mark said, leaning back in his chair, having long since finished his meal by dint of not being able to get a word in edgewise.
I won't be able to get a word in edgewise until they calm down, and since neither of them really knows what they're talking about.
But listening to the boys was giving her a lot of new ideas, even if she hadn't been able to get a word in edgewise.