Also known as "first man". In any sporting event or petty competition involving elimination, "first jelfs" can be shouted by the first person eliminated and apparently they are magically allowed back in the game. Utter bullshit.
*playing drinking games*
All: "AHHH!! Richard you lost you shithouse! Get that shot down ya lad"
Richard: "Nah first jelfs".
*No shot consumed*
Being jealous of your bestfriend because they spend all their time with another friend...And they always leave you or drop all your plans for this person, and it really annoys and upsets you..
Villain 'heyy Bestfriend, your the bestest friend in the whole world, noone could replace you! we are going into town and having a sleepover!'
*10 Mins later*
Person 1 'Hey im going into town with *Person 3* now, so dont show up ok'
*In town*
Villain '* Completely Blanks You*'
Victim 'What the f*** is her problem, Should i still be friends with her? Totally JelFriendsForever.'