be on your uppers

upper | American Dictionary

upper
adjective[ not gradable ]
us/ˈʌp·ər/
at a higher position or level (than something else), or being the top part of something:
Our company occupied the three upper floors of the building.
upper
noun[ C ]
us/ˈʌp·ər/
the top part of a shoe

Examples of upper

upper
Employing the upper bound in turn drops both sets of returns by only 15 per cent.
The students were told that upper-case target words would be presented brie-y on a computer screen between two rows of hash-signs (########).
We must be careful about condition (12) which specifies that the two upper surfaces have the same convexity.
In the upper stripe, a cupola projects upward to the left while buildings and trees form a staggered boundary to the right.
In the upper stripe, acupolaprojects upward to the left while buildings and trees form a staggered boundary to the right.
Figure 6 shows a profile with the upper boundary vertical at the corner.
This upper bound will be useful later in the paper.
Recovery of voluntary motion in the upper extremity following hemiplegia.
It does not take into account a possible extension of the upper right part of the character.
On the upper level of comprehensive school the content items presented differed slightly from the preceding phase.
The assumption of an exogenously given upper bound on penalties, while widely employed in the literature, is clearly an unsatisfactory feature of models of corruption.
Right upper venous dratriage is delayed, and the stenous is some distance proximal to the site of anastomosis.
Analysis of the exposed geology allows the definition of three stratigraphic units: lower, middle and upper, separated from each other by unconformities.
We are ready to prove the main step in the upper bound.
Each plant was labelled with its flowering date when pollen had been released by florets from the upper two-thirds of the panicle.
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