"Wakup" from ATC = We Copy.
I was listening to an exchange on 8888 a few years ago between UN202 and Luanda. The pilot gave the whole story incl POB, Endurance, Reg....everything only to be answered with a "Wakup" . So our diligent pilot says everything again only to get another "Wakup". This got him so the hell in that he just replied " no man, you wake up!" The whole exercise took nearly 10min. Was hilarious.