Coyote: Smuggler of undocumented immigrants Mule: Border-crosser hired to smuggle drugs La Migra: Mexican slang for Border Patrol agents Still watch: When an agent waits in a fixed position along the border TJ: Tijuana Sign cutting: An expression from frontier days that means following a trail App: Apprehend. ““We apped 130 last night’’ OTM: Other Than Mexican. ““Of the 130, nine were OTM.''