look up any word, like cleveland steamer:
 
1.
gse
green street elite from the film green street the best dam film about british football hooligans fightin against each ova its immense
tommy: f off u gse wankers
pete: no u f off cos the gse will kick ur ass
tommy: ok im sorri (tommy ses in a pussy voice)lol
by ben rush aka (rushy) June 21, 2006
 
2.
GSE
get so excited
"OMG, GSE for HP3!"
by cru-er December 10, 2008
 
3.
GSE
Grapefruit seed extract (GSE), also known as citrus seed extract, is a liquid derived from the seeds, pulp, and white membranes of grapefruit.

This extract has been stated by some practitioners of alternative medicine to possess antibacterial, antiviral, and anti-fungal properties.2 It has been recommended by some nutritionists for the treatment of candidiasis, earache, throat infections, and diarrhea.

Source: Wikipedia: Grapefruit Seed Extract
Remember to get me a bottle of GSE from the Health Shoppe; I have a bad case of the runs.
by Dr. Dank Nugget June 05, 2009
 
4.
GSE
Gayest Shit Ever

Something that is either extremely retarded, or extremely homosexual in the literal sense.
Olympics announcer: That Olympic figure skater is putting on a hat of.. roses!?
Sam: OMG, wtf, GSE.. *facepalm*

Pedro: Are you Japanese? I like Japanese boy..
Vince: No, I'm not. I'm Chinese. *slowly backs away*
Pedro: Really?? I like Asian Boy.. *advances towards Vince* I have lots of money, my parents will be out for 2 weeks..
Ada: *laughs* GSE!
by Slammer111 March 05, 2010
 
5.
gse
Gay Sexual Eskimos. The dirtiest of the gays. Often seen doing other clan mates in the ass. Like to hang around the GSA lobby, and talk talk talk.
"Damn, gse are fucking gay!"
by A Fellow Friend August 13, 2003
 
6.
GSE
The baddest gangster crew, origionation from Colchester North East England. The Grammer School Elite otherwise known as GSE are feared by many not only in Colchester but in the whole of the UK.
"Shit man its the GSE"
"lets bust befo' we get popped"
by G.S.E October 15, 2006
 
7.
gse
Gay Sexually-Active Eskimos___who live in germany, the uk and surrounding areas
gse clan
by you better believe it August 13, 2003