n.
  - a surface of which one end or side is at a higher level than another. 
▸a difference in level or sideways position between two ends or sides.
 ▸a part of the side of a hill or mountain, especially as a place for skiing.
 - US informal, offensive a person from East Asia, especially a Vietnamese.
 
v.
  - be inclined from a horizontal or vertical line; slant up or down.
 -  Brit. informal move in an idle or aimless manner. 
▸
(slope off)
 leave unobtrusively in order to evade work or duty.
 
 
  Phrase
  
    - at the slope
 Military  (of a rifle) held with the barrel on the left shoulder and the butt in the left hand.  - slope arms
 Military  hold a rifle at the slope. 
   
  Etymology
  C16: from the obs. adverb slope, a shortening of aslope.