Sentence:  Ole Fritz keeps on tryin' ter feel our possies at night with small patrols, an' they tried ter raid us two nights ago, but <WSD>came a gutser</WSD>, 'coz we hopped out an' met 'em, an' they put their 'ands up. 
Meaning of the word marked with <WSD> tags:  To fail miserably; to make a huge mistake; to fall flat on one's face.