use up

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.