When someone claiming to be your friend disparages, or defames your character behind your back, but won't say it to your face.
A feeble attempt at humor at the expense of another person, in an attempt to make oneself feel better.
A person completely devoid of character or morals.
I found out from a friend that I got "Frohlic'd" last night, by someone at a party.
I hear you "Frohlich'd" a friend of mine.
That guy is totally "Frohlich'd".