stand up

stand up  {v.}

1. To rise to a standing position; get up on your feet.

A gentleman stands up when a lady enters a room.

2. To be strong enough to use hard or for a long time.

A rocket must be built strongly to stand up under the blast-off.

The old car has already stood up for twenty years.

Compare: WEAR WELL.

3.  {informal}

To make a date and then fail to keep it.