ex tempore

from WordNet (r) 3.0 (2006)
ex tempore
    adv 1: without preparation; "I don't know the figures off-hand"
           [syn: {off-hand}, {ex tempore}]
    
from Bouvier's Law Dictionary, Revised 6th Ed (1856)
EX TEMPORE. From the time without premeditation. 
    

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