steal a glance at
steal a glance (at someone or something)
To look at someone or something very quickly and discreetly. That boy just stole a glance at you again! I think he likes you! I stole a glance to see if the teacher was watching us.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
steal a glance at someone or something
Fig. to sneak a peek at someone or something. He stole a glance at his brother, who appeared to be as frightened as he was. Karen stole a glance at her watch and yawned.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.