hold one's end up

[hold one's end up] or [hold up one's end] or [keep one's end up]or [keep up one's end] {v. phr.}, {informal} To do your share of work;do your part.

Mary washed the dishes so fast that Ann, who wasdrying them, couldn't keep her end up.

Susan kept up her end ofthe conversation, but Bill did not talk very much.

Bob said hewould lend me his bicycle if I repaired the flat tire, but he didn'tkeep up his end of the bargain.