Comes from that band with the dude from Hot Rod (well theyre a group) and they made the song 'jizzed in my pants'. A short form for which can be made is "jimp", with a past tense used as "Jimped"
Example 1:
Friend - "Dude, did u just see that hot pic"
You - "YO i just jimped!"

Example 2:
~Random Girl bends down~
You - (Whisper to friend) "yo, jimped"
by DJSTUDIOGSKILLET April 22, 2010
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Notches down the spine of a blade created to provide grip on a knife beyond the bolster. Many knives, especially pocket knives, have very shallow or widely spaced non-functional notches that are used solely for aesthetic purposes.
Ontario Rats, SOG Seal knives, Kershaw Rogue all have jimping
by Dead Lemonz August 9, 2010
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Acronym for: "Jizzed In My Pants", from the SNL Digital Short (by the guys from the Lonely Island).

http://www.youtube.com/watch?v=4pXfHLUlZf4&fmt=22
"Speeding down the street when the red lights flash
need to get away need to make a dash
A song comes on that reminds me of you and I

JIZZ IN MY PANTS"

Damn those mozzarella sticks made me JIMP.
by Fresh Wes December 8, 2008
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Jimp, or to jimp, is the hypothetical ejaculation or "jizzing" in your pants often followed by the subject experiencing something highly stimulating or pleasurable.

Derived from the phrase "Jizz in my pants"
When Austin beat his favorite video game he exclaimed, "I just jimped!"
by Billy Nurnell April 7, 2007
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(Jizz In My Pants)

Taken from the song of the same title, JIMP can refer to any moment that extreme excitement occurs - bordering on the orgasmic.
Jill: So, chocolate?
Tim: Meh.
Jill: Some sweets?
Tim: Hmmm.. maybe.
Jill: Chuck Norris action figu..
Tim: Jimp.

Jill: Alright, I'll get you the Norris doll.
by Myoiden Ramre March 13, 2009
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To ejaculate prematurely, esp. in one's pants. From the acronym JIMP for "Jizz in My Pants", the title of a song by the group The Lonely Island.
Man, I just walked in the change room and saw Cody bent over & wearing nothing but snug-fitting black boxer briefs. I damn near jimped right then & there!
by Spunkelunker July 11, 2010
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J.I.M.P. is an acronym which is a shortened way of saying 'Jizz In My Pants'. It stemmed from a video originating from Saturday Night Live. The term is used on many internet chat sites as a replacement for other acronyms such as 'ROFLMAO', for anything which the writer finds to be extremely hilarious, sexually arousing or highly enjoyable. As more and more people watch the music video, the term JIMP is becoming more and more acceptable, but it is particularly important when choosing to use this term that the audience understands its meaning, or it is ineffective.

Eventually this term will be a globally used acronym by all internet users, as more and more people watch the video clip. Currently the video has had 26,911,814 hits in total and is ever climbing.
"WOMG that's so funny it made me JIMP!" "That picture just made me JIMP ; " "I scored the winning point, it made me JIMP!"
by Bradley007 February 20, 2009
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