[f. WISE a. 3 b (b).] To wise up (U. S. slang): to ‘get wise’; to ‘put wise.’
1919. J. Buchan, Mr. Standfast, iii. 70. You ’ve got to wise up about Gresson with the whole forces of the British State arrayed officially against you.
1922. P. G. Wodehouse, Girl on Boat, i. 25. You won’t wise him up that I threw a spanner into the machinery?
