| Jargon basement [adj.] | The worst of the worst, nails-on-a-chalkboard jargon. |
| Jargonaut [n.] | A true master of ridiculous jargon, this individual has a 'robust' vocabulary, but none of it means anything.
Submitted by Chuck H. |
| Jawbone [v.] | To talk someone into doing something. |
| JDI [n.] | Just Do It. Something that your boss believes any reasonable person could complete quickly and simply. "End of discussion. This is a JDI; get it done!"
Submitted by Matt. |
| Jingle [n.] | A phone call. "Just give me a jingle before you head home today." |
| Job lock [exp.] | Employees that want to leave their jobs, but don't want to lose their benefits. |
| Job-ready [adj.] | A potential employee that has the right qualities. |
| Jockey for position [v.] | To sell oneself to gain a larger market share. |
| John Hancock [n.] | Signature. "We just need your John Hancock on these forms." |
| Johnny-come-lately [n.] | A late entrant into a particular market. |
| Juice [n.] | Connections, influence. |
| Jump the couch [exp.] | When unpredictable or strange behaviour has a negative impact on one's reputation. Thanks for this one, Tom. |
| Jumped the shark [adj.] | A good grounding in pop culture slang is required to know this term meaning that something has passed its prime. |
| Junior leaguers [n.] | Rich and unemployed young women. |
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