(Noun)
Jimmy was devastated when his friends discovered that he was actually a Kathrin in a sex club on weekends.
(Verb)
Florian: How was your blind date last night?
Guunter: Ach du
lieber himmel!! Helga was amazing!
Florian: You mean the chick with the one eye?
Guunter: DUDE! She gave me a Kathrin last night! AND I got to cum in her eye!