What is Clinically Significant Other?
1.
A significant other defined by an (undesired) medical condition, not by a agreed-upon relationship status.
Combination of "clinically significant" and "significant other."
They were only dating casually, but when he gave her the Clap, he became her clinically significant other.
See
Random Words:
1.
To lose an election to Barack Obama by a large margin.
Did you watch the election results last night? McCain totally got Barackrolled!
..