One who pressures or forces someone into doing something. Oh, she immediately agreed to come tonight—I didn't even have to be an arm-twister.They had to be arm-twisters to convince me to start volunteering, but when I finally did, I realized how much I loved it.
arm-twister
n. someone who uses strong persuasion. I hate to seem like an arm-twister, but I really need your help on this project.