birthday fever

(applies to certain people only) when a person you used to have a crush, situationship or any other type of romantic history's birthday comes up, you suddenly think about them and feelings reemerge. for some, these feelings dissipate again, but for some no. (only applies if you know this person's birthday)

example: I started thinking about Logan a few days ago and I thought I was over him, but turns out it was just birthday fever.

Texas Fever

Texas fever
n.
An infectious disease of cattle first identified in Texas, characterized by high fever, anemia, and emaciation and caused by a parasitic protozoan (Babesia bigemina) that is transmitted by cattle ticks.

This is not to be associated with any form of homosexual activities

"Did you hear about those cows"
"Yeah I heard they caught texas fever"

"hmm must have been those ticks"