Flash him a look - Idioms by The Free Dictionary
flash (someone) a look (redirected from flash him a look)
flash (someone) a look
To look at someone, usually quickly and unexpectedly. That guy over there is so cute! Geez, don't stare, just flash him a look.
flash somebody a ˈsmile, ˈlook, etc. smile, look, etc. at somebody suddenly and quickly: She flashed him a quick smile, then was gone before he could say anything.