Verb
coach up (third-person singular simple present coaches up, present participle coaching up, simple past and past participle coached up)
(transitive) To coach; to instruct.
When I went to Scotland to do another movie, I would sing with a coach up there and then when I went to New York I sang with a coach over there-I mean I've now sung with coaches in LA, New York, London, Glasgow, St Louis and Rio de Janeiro. Gerard Butler