Слово "slog". Англо-русский словарь Мюллера

And if you slug a connected man like Percy Wetmore once, you might as well just go right on slugging, because there's no going back.

To his misfortune he immediately bumped into Persidsky, the slogger.

Great areas of it, even for a Party member, were neutral and non-political, a matter of slogging through dreary jobs, fighting for a place on the Tube, darning a worn-out sock, cadging a saccharine tablet, saving a cigarette end.