(v): to gather together in large numbers
(v): push down forcibly
(v): move with force, "He pushed the table into a corner"
(v): crush or bruise
(v): injure the underlying soft tissue or bone of
(v): interfere with or prevent the reception of signals
(v): make a break in
(v): get stuck and immobilized
(v): fail to function or function improperly
(v): crowd or pack to capacity
(v): cram into a cavity
(v): block passage through
(v): be a hindrance or obstacle to
(n): preserve of crushed fruit
(n): fruit preserved by cooking with sugar
(n): informal terms for a difficult situation
(n): a condition or state of affairs almost beyond one's ability to deal with and requiring great effort to bear or overcome
(n): a dense crowd of people
(n): a large number of things or people considered together
(n): deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems
(n): electronic warfare undertaken to prevent or reduce an enemy's effective use of the electromagnetic spectrum
Many baby boomers remember the wildly popular JAMS shorts of the 1960s and 1980s. JAMS were closely associated with the California and Hawaii surf scenes. The JAMS brand still exists, and has grown into today's Jams World clothing and accessories line.
_Wikipedia
Growing up in southern California among surfers I know this word as a generic term spelled without capital letters. It was used for any baggy knee length swim shorts with drawstring waist that came in loud floral patterns. Jams is short for pajamas and the comfort of pajamas is implied.