mugger
n.— «For the boys, between nine and 12 years old, the skill of throwing a lasso to corral a runaway calf has already been developed. The competitors also proved adept at tying three of the animal’s legs together while the calf was on the ground. It’s the in-between step of actually lifting the calf of its feet and dropping it to the ground where the young athletes need a little help. And they get it from older cowboys—known in rodeo parlance as the “mugger.”» —“HPJRA finals: Dads give ‘mugging’ aid” by Eric Butler Clovis News Journal (New Mexico) July 20, 2006. (source: Double-Tongued Dictionary)