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[up in the air]  {adj.} or  {adv. phr.}

1.  {informal}

In great anger or excitement.

My father went straight up in the air when he heard I damaged the car.

The Jones family are all up in the air because they are taking a trip around the world.

 […]

[up one's alley]

See: [DOWN ONE'S ALLEY].

[up one's sleeve] or [in one's sleeve]  {adv. phr.}

1. Hidden in the sleeve of one's shirt or coat and ready for secret or wrongful use.

The crooked gambler hid aces up his sleeve during the card game so that he would win.

2.  {informal}

Kept  […]

[upon oneself]

See:

[TAKE ON ONESELF] also [TAKE UPON ONESELF].

[upon one's head]

See: [ON ONE'S HEAD].

[upon the spot]

See: [ON THE SPOT] (1).

[upper]

See:

[KEEP A STIFF UPPER LIP],

[ON ONE'S UPPERS].

[upper crust]  {n.},  {informal}

The richest, most famous, or important people in a certain place; the highest class.

[upper hand] or [whip hand]  {n.}

Controlling power; advantage.

In the third round the champion got the upper hand over his opponent and knocked him out.

* /The cowboy trained the wild horse so that he finally got the whip hand and tamed the  […]

[upper story]  {n.}

1. A floor or level of a building above the first floor.

The apartment house where Gene lives is five stories high and he lives in one of the upper stories.

2.  {slang}

A person's head or brain.

* /Lulu has nobody home in the  […]