fagging

(verb) act as a servant for older boys, in British public schools. Synonyms: fag.

(verb) work hard. Synonyms: labor, labour, toil, fag, travail, grind, drudge, dig, moil. Examples: "She was digging away at her math homework." "Lexicographers drudge all day long."

(verb) exhaust or get tired through overuse or great strain or stress. Synonyms: tire, wear upon, tire out, wear, weary, jade, wear out, outwear, wear down, fag out, fag, fatigue. Examples: "We wore ourselves out on this hike."