1) The act of becoming aggressive to ones peers/enemies, usually whilst under the influence of narcotics and/or alcohol.

2) To threaten a rival male and/or extort for large sums of money.

3) Getting lemon.
"Don't get Jif Lemon"

"That geezer was getting proper Jif Lemon"

Melvin: "Someone keyed up my Sean Goater"
Me: "Savage mate, did you find out who it was?"
Melvin: "Yeah mate, i found out where he lived, phoned him up and got Jif Lemon on him .... he came round later that day with 250 quid."
by Poonoob July 26, 2010
Get the Jif Lemon mug.