Stickle for is a phrase used to describe someone who is very particular or reluctant to compromise. Some synonyms for the phrase include being inflexible, uncompromising, stubborn, unyielding, resolute, and adamant. These words all convey the idea of standing firm in one's beliefs or decisions and being unwilling to budge. Other phrases that can be used instead of stickle for include being a stickler, having a strict adherence, and being a devotee. People who are stickle for often have strong convictions and are not easily swayed by others, which can make them difficult to work with or persuade.