This is an abbreviation for "just a mustache". It refers to the popular style of past of men sporting "just a mustache" without any other facial hair whatsoever. JAM was popular in many decades before the 1980s, but seems to have gone to the wayside since then. Often, men sport JAM in situations almost as a joke. This term was coined in the 1990s in Sarnia, Ontario and anyone who thinks they coined it before then may have done so concurrently, but not before me.
1. Magnum PI has JAM.
2. Hitler had JAM....it was a toothbrush JAM.
3. JAM rules.
1. To insert penis in vagina, usually with a lot of aggression and power.
2. To fuck.
He will jam it inside her tonight.
Sort of a muddle, stuck, frustrated.
I'm in a jam!
John is in a jam with his maths homework.
A very cool and nice person. Jam is one of the best ppl u will meet and there keeper. They are a soulmate for life xoxoxo
100 true in every way.
"Wow Jam is so cool and funny, I wish I were them."
jam is so cool i love jam they r so cool
but jam is also a spread thingy
but don’t eat it because jam is cool
but also tasty
jam is soooo cool
yeahhhhhh and jam is a furry
raven ; damn that person is so cool
bartholomew ; yea that’s jam they r so cool