Sure! Here are some example sentences using "motormouth":
1. Jake is such a motormouth; he talked non-stop for the entire meeting.
2. I couldn't get a word in during lunch because Sarah was being a total motormouth.
3. He's a motormouth, but at least he keeps the conversation lively.
4. You have to be patient with Karen; she's a bit of a motormouth when she's excited.
5. As soon as the interview started, the motormouth in him took over, and he barely let anyone else speak.
It generally describes someone who talks a lot and very quickly!