a glutton for punishment Definition

glutton¹
noun

1. derog
Someone who eats too much.
Thesaurus: gourmand, pig, hog, cormorant, gorger, guzzler, gobbler (US), epicure, sensualist; Antonym: ascetic.
2. Someone whose behaviour suggests an eagerness (for something unpleasant).

Example: a glutton for hard work

Derivative: gluttonous
adj

Greedy.

Derivative: gluttony
noun

derog
The habit or practice of eating too much.

Idiom: a glutton for punishment

Someone who is eager to undertake difficult or arduous tasks.

Etymology: 13c: from Latin gluttire to swallow.