Sentence:  Every once in a while, maybe twice a year, Bessie gets all galled under the britchin' about something [...] Usually over some triflin' little thing that don't amount to a hill of beans, like I won't wash my feet or something, but she gets all <WSD>swole</WSD> up like a snakebit pup and says she's leavin' me for good this time. 
Meaning of the word marked with <WSD> tags:  "Followed by" '''(up)''': upset; experiencing strong negative emotion.