A trusted male friend who is tasked with ensuring a girl's safety when out clubbing, including getting her home safely.
The wheelbarrow shall be required to defend her from any unwanted male attention, and to take her home should she get too drunk. On the way home he may be required to piggyback her, carry her up stairs, hold her hair while she vomits, and tuck her safely into bed.
Girl A: "What time are you leaving?"
Girl B: "When my wheelbarrow goes home I'm out."