When you fall for a ginger or have a preference for gingers.
Ben: You know that ginger in our math class is really cute
Kevin: You mean Ellie?
Ben: Yeah
Kevin: Well i guess you have gingeritis
When someone falls for a ginger, or has a thing for gingers.
Ben: You know that ginger in our math class is real cute.
Kevin: Oh you mean Ellie?
Ben: Yeah
Kevin: Well it looks like you have gingeritis