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Related to jammed: jammed up
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1. verb To play music together. I heard you guys jamming out in the garage—you really sounded great! We jammed until the wee hours of the night.
2. verb To leave. Aw man, I've got to jam. See you later.
3. verb To forcefully shove a basketball into the net, as by dunking. He was able to jam it right at the buzzer and give us a two-point lead.
4. noun Difficulty or trouble. I'm in a bit of a jam here—my car won't start, and I have a job interview in half an hour.
5. noun In basketball, the act of forcefully shoving a basketball into the net, as by dunking. His jam right at the buzzer gave us a two point lead.
6. slang A song that one loves or likes a lot. Yo, this is my jam! Turn it up!
7. slang Something one particularly prefers, desires, enjoys, or cares about. I knew classic literature was your jam, so I thought you might like this book I found. Thank you for the invitation, but long-distance cycling just isn't really my jam.
8. slang A car. The term comes from rhyming slang in which "jam" is short for "jam jar," which rhymes with "car." Primarily heard in UK. That's a beauty of a jam you've got there. What is it, a '67? My jam won't start today—can I get a ride with you?

jammed (up)

1. Very clogged, congested, or stuck. The freeway was totally jammed this morning. It took me nearly two hours to get to work! The rain gutters have gotten jammed up with all sorts of gunk. When was the last time you cleaned them?
2. Locked or stuck in an unworking position or condition. This mechanism keeps getting jammed up. Could you take a look at it? The dang printer is jammed again. What the heck is wrong with this thing?
3. Very busy or preoccupied. I'm sorry for not responding sooner, but I've been a bit jammed up at work recently. We've had an influx of applications this year, so our support team has been pretty jammed.
4. obsolete slang Drunk. It was clear by his staggered walk and slurred speech that the fellow was fairly jammed up.
5. obsolete slang In police custody; arrested. Didn't you hear? Jimmy the Heel got jammed last week. A copper nabbed him while he was looting cars.
See also: jam
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.


1. mod. arrested. (Underworld.) Willie got jammed for speeding.
2. mod. alcohol intoxicated. I’m a little jammed, but I think I can still drive.
3. Go to jammed up.
4. mod. upset; annoyed. He’s really jammed because he flunked the test.
See also: jam


See also: jam
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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References in periodicals archive ?
So that, it is difficult to differentiate normal scenario with jamming scenario, (ii) PSR does not detect the reactive jamming [17] and does not distinguish between various types of jamming, and (iii) the value of PSR stays high (unchanged) even if the data packets are dropped at the destination node (because the destination node is jammed).
The reason behind choosing these metrics in cluster based WSNs are discussed as follows; i) The PDR is an excellent metric since the cluster head can measure it by itself accurately without much computational overhead, and PDR can identify the presence of all types of jamming attacks at the physical layer and data link layer, ii) The CH can easily measure the RSSI either by using formulae as per the chosen propagation model (in this paper, free space propagation model is chosen) or by the node's RF power meter, iii) In the proposed system (section 4), the CH estimates the metrics (PDR, RSSI) and makes decision about 'jammed situation' or 'non jammed situation'.
It can be ascertained that the node is jammed, if observed PDR value is lower than its threshold and estimated RSSI value is higher than its threshold is encountered.
If the observed RSSI is greater than the RSSI threshold then the behavior of the corresponding member is ascertained as unusual and the JDT declares that the corresponding member is jammed by the jammer.
If the MaxPDR is greater than or equal to the PDR threshold then JDT ascertains the member's behavior as L or N and declares that the member is not jammed (normal).
Sleep until the periodic timer matures (every 3000msec to detect jammed node) 2.
1 that three members (M1, M2 and M3) are jammed. The two members (M4 and M5) and cluster head (CH21) are not affected by a jammer.
The True detection means, CH detects a node as abnormal during that node is jammed. The False detection represents that CH faultily detects a node as abnormal though that node is normal.
The metrics used for estimation of Detection Ratio, False alarm and Undetection ratio are given as follows: True Positive Index (TPI) represents number of correctly detected jammed nodes.
The jammed member ratio (jmr) is defined as the ratio of the number of members successfully jammed by the jammer to the number of members falling within the coverage range of the jammer (number of members covered by the jammer).
where nsj represents number of members successfully jammed by jammer and nfj represents number of members falling within the coverage range of the jammer.
In Table 8, J denotes Members correctly detected by JDT while node is jammed, F denotes Members incorrectly detected as abnormal by JDT while node is in normal and U denotes Members incorrectly detected as normal by JDT while node is in abnormal.