make someone laugh on the other side of their face
perturb
verb
-
To disturb; to bother or unsettle.
-
To modify the motion of a body by exerting a gravitational force.
-
To modify slightly, such as an equation or value.
-
To slightly modify the motion of an object.
How often have the words make someone laugh on the other side of their face and perturb occurred in a corpus of books? (source: Google Ngram Viewer )