An informal, at best verbal, understanding that what is being discussed is in confidence. No paperwork, just trust, protects ideas from being stolen.
I told Mark about our transporter research under a frieNDA.
Used by males to distinguish a female friend whom of which the relationship with is platonic. To be used in lieu of saying "My friend who's a girl". Replaces the annoying need to stop a story and explain that the friend is not a girlfriend.
Similar to the Spanish word "amiga".
See also: friendo
Sarah: Bill, are you going to the show with your girlfriend?
Bill: No, I am going with my frienda, Haley.