Definitions by Hans from Freshman Science

ringer upper 

A synonym for "cash register" used mostly by lifeguards suffering from ADD.

Johannes: So, Mildred, I didn't know you had to work the snack bar too.

Mildred: Yea, but we don't use a ringer upper since everything costs 75 cents.

ringer upper by Hans from Freshman Science August 13, 2009