skim the surface
To do something very superficially.
He seems knowledgeable in many different areas but his familiarity is very superficial, since he only skims the surface of everything he touches.
slap in the face
An insult; a disappointment.
We felt that it was a slap in the face when our gift was returned unopened.
Doris thought it was a slap in the face when her boyfriend invited another girl to the dance.
To insult; embarrass; make feel bad.
John slapped our club in the face by saying that everyone in it was stupid.
I don't want to slap her in the face by not coming to her party.
stare in the face
To be about to meet or to happen to (you.)
Grandmother became very sick and death was staring her in the face.
Defeat stared them in the face, but the soldiers fought on bravely.
To be easy to see; be plain.
Are you looking for your pencil? It's on your desk, staring you in the face.
Their friends all knew that Mary loved John, but John did not see it even though it was staring him in the face.
A face that is not laughing or smiling.
Mary told all the funny stories she knew to try to make Joan laugh, but Joan kept a straight face.
It is hard to tell when Jim is teasing you. He can tell a fib with a straight face.
When Bob fell into the water, he looked funny and I could hardly keep a straight face.
throw something in one's face
throw something in one's teeth
To blame a person for (something wrong); not allow someone to forget (a mistake or failure). Often used with back.
Bob came home late for dinner last week, and his mother keeps throwing it back in his face.
I made a mistake in the ball game and the boys keep throwing it back in my teeth.
to one's face
Directly to you; in your presence.
I told him to his face that I didn't like the idea.
I called him a coward to his face.
Insincere; disloyal; deceitful.
Don't confide too much in him as he has the reputation of being two-faced.