From Longman Dictionary of Contemporary Englishhold/keep your end uphold/keep your end upBritish English informalBRAVE to stay brave and hopeful in a difficult situation → end
Examples from the Corpus
hold/keep your end up• It is difficult to get skips in this age group capable of keeping their end up at this level of competition.• Richter kept his end up by arranging a press visit to Huemul Island on 21 June, 1951.• It helped them keep their end up in battle, too, claim historians. 