One idea is a shortened version of their name... Another idea is to call them something that they remind you of or something that they are...like my friends call me "Skinny" or "Blondie". Things like that. Hope I helped out a little bit :)
my friend alex called me slaint (sl*t, and a saint. im neither of the above) so hes "alex the man-sl*t" its not insuting to him, so i figured it wud be ok. so anything u want really. if their true friends, they wont take it to heart
I have a friend I call SIGH which stands for ShortIsh, Grey, Handsome. Add an extra syllable to their name, Beth becomes Beh-eth. Pick out a characteristic you admire and work that into what you call them.
The golden budah some one who always gets what they want and a ding dong that days it all a sloth for the lazy slow friends a big mouth for those gossip creeps that talk about every one ad long as they leave the room there fair game the bottom feeders ofthe earth