[IYKWIM] "If you know what I mean"

[j00, j00s, j00r] Leet speak for "you" or "your"

[Jack] See: [ALL WORK AND NO PLAY MAKES JACK A DULL […]

[jack] See: [EVERY LAST MAN] also [EVERY MAN JACK].

[jack of all trades] {n.}, {informal} (Often followed by "master of […]

[Jack Robinson] See: [BEFORE ONE CAN SAY JACK ROBINSON].

[Jack the lad] {n.} A young man who is regarded as […]

[jack up] {v.} 1. To lift with a jack. * /The […]

[jack up] {v.} Inject an illegal drug.

[jack-rabbit start] {n.}, {informal} A very sudden start from a still […]