Wiktionary
lump it
vb. (context idiomatic British English) To endure, accept, put up with a situation one does not like.
Usage examples of "lump it".
Compare them caponchin trowlers with the Bridge of Belches in Fairview, noreast Dublin's favourite souwest wateringplatz and ump as you lump it.
Of such stuff are martyrs made, and their families are obliged to lump it.
Arrakis was not merely the dead lump it appeared to be on the surface.