Vap
Vap (vap) , noun
[See Vapid.]
That which is vapid, insipid, or lifeless; especially, the lifeless part of liquor or wine. [Obsolete]
In vain it is to wash a goblet, if you mean to put into it nothing but the dead lees and vap of wine.
Vap (vap) , noun
[See Vapid.]