cop out

to break a promise or agreement don't cop out on your promise to pay for the damage Synonyms back down, back off, back out, renege, fink outRelated Words chicken (out), wimp out; backpedal, backtrack; abjure, abnegate, disavow, forswear (also foreswear), recall, recant, repudiate, retract, take back, unsay, withdraw; beg off, cry off [chiefly British]Near Antonyms adhere (to), follow through (with); comply (with), fulfill (or fulfil), honor, keep, satisfy