[use up] {v. phr.}
1. To use until nothing is left; spend or consume completely.
* /Don't use up all the soap. Leave me some to wash with./* /Jack used up his last dollar to see the movies./
Compare: GIVE OUT(5). 2. {informal} To tire completely; make very tired; exhaust; leave no strength or force in. — Usually used in the passive.
* /After rowing the boat across the lake, Robert was used up./
Compare: GIVE OUT(4), WEAR OUT.