Noun, Suru verb, Intransitive verb
enduring something out of pride; putting up with it; grinning and bearing it
そんなにやせ我慢しなくても、はやくこっちに来れば良かったのに。You should have come here sooner instead of putting it off out of pride for so long.
Also written 痩せ我慢【やせがまん】