jampack 

when there's no more room to add a person. crowded area

the jeep's so jampacked, i had to on the left side of the driver.

jampack by JHEDEBE March 11, 2009

Jampack with the seven 

When I was younger I had a cat that was grey and he was round and liked orange fizzles and then the dinosaur went to him and asked him to change spots with him then hes like NO!

Yo man that cat was of off the HIZZY fo shizzy and the dough dolla holla molla colla that my friend is the jampack with the seven

Jampack with the seven by ZOOBAID October 20, 2003

Jamackan 

Someone who adopts a fake Jamaican accent or appearance in an attempt to change their image or seem Carribean/mellow/hip/etc. This should not be confused with those who honestly accept such Jamaican qualities honestly, this term applies only to posers.

Snoop Dogg changing his name to Snoop Lion is such a Jamackan move, man.

or

Miss Cleo was born in LA, she's a total Jamackan.

Jamackan by Labtech41 January 11, 2013

Jamackan 

Noun: A fake Jamaican person or persons.

Verb: The action of talking in a fake and/or bad Jamaican accent.

Adjective: A term used to describe a very fake and/or bad Jamaican accent.

Possible sources:

1. MaximusBlack's Dyslexia

"Jeff I know you were trying to sound Reggae but you just went full-retard Jamackan."

Jamackan by Puffmax January 11, 2013

jamhacky 

like you're totally annoyed at this one person, just because of the fact that they feel fly, or that they were totally macking "this one time..." and they're just not. they totally have no game and just really fail at stuff that they describe. they're usually not mackin' at all, so you need to see it to believe it, but they probably won't show you. so they're being a jamhacky.

One: Yo, bitch I was like totally all up on that shit!!

Two: What the hell does that mean?

One: GIRL I was mackin' tonight!

Two: Well you're a friggen jamhacky.

jamhacky by CheeryCheeryGainGain March 21, 2010

jamsack 

1. A group of deer.
2. An excessive amount of something.

A jamsack of deer ran rampant across the meadow.

The accountant had a jamsack of paperwork to complete before morning.

jamsack by stevilmetalhead June 10, 2011

Jamsacking 

The act of smearing one's testicles in a fruity jam and placing them onto the eyes of an unsuspecting victim. A derivative of teabagging.

Using Rowntree's strawberry jam, I jamsacked Davey - he was not best pleased.

Jamsacking by JM March 18, 2004