And thenne syre Gawayne made many men to blowe vpon syr launcelot / And all at ones they called hym fals recreaunt knyght.
"And then Sir Gawaine made many men to blow upon Sir Launcelot; and all at once they called him false recreant knight."

How far the very custom of hearing anything spouted withers and blows upon a fine passage, may be seen in those speeches from [Shakespeare's] Henry V. which are current in the mouths of schoolboys.

If it wos so, which I still don't say it is (for I will not prewaricate to you, sir), let that there boy keep his father's place, and take care of his mother; don't blow upon that boy's father — do not do it, sir — and let that father go into the line of the reg'lar diggin', and make amends for what he would have undug […]

Blow upon

Meaning

Verb